text: /*! Buttons for DataTables 1.5.6
   * ©2016-2019 SpryMedia Ltd - datatables.net/license
   */
  
  (function( factory ){
  	if ( typeof define === 'function' && define.amd ) {
  		// AMD
  		define( ['jquery', 'datatables.net'], function ( $ ) {
  			return factory( $, window, document );
  		} );
  	}
  	else if ( typeof exports === 'object' ) {
  		// CommonJS
  		module.exports = function (root, $) {
  			if ( ! root ) {
  				root = window;
  			}
  
  			if ( ! $ || ! $.fn.dataTable ) {
  				$ = require('datatables.net')(root, $).$;
  			}
  
  			return factory( $, root, root.document );
  		};
  	}
  	else {
  		// Browser
  		factory( jQuery, window, document );
  	}
  }(function( $, window, document, undefined ) {
  'use strict';
  var DataTable = $.fn.dataTable;
  
  
  // Used for namespacing events added to the document by each instance, so they
  // can be removed on destroy
  var _instCounter = 0;
  
  // Button namespacing counter for namespacing events on individual buttons
  var _buttonCounter = 0;
  
  var _dtButtons = DataTable.ext.buttons;
  
  /**
   * [Buttons description]
   * @param {[type]}
   * @param {[type]}
   */
  var Buttons = function( dt, config )
  {
  	// If not created with a `new` keyword then we return a wrapper function that
  	// will take the settings object for a DT. This allows easy use of new instances
  	// with the `layout` option - e.g. `topLeft: $.fn.dataTable.Buttons( ... )`.
  	if ( !(this instanceof Buttons) ) {
  		return function (settings) {
  			return new Buttons( settings, dt ).container();
  		};
  	}
  
  	// If there is no config set it to an empty object
  	if ( typeof( config ) === 'undefined' ) {
  		config = {};	
  	}
  	
  	// Allow a boolean true for defaults
  	if ( config === true ) {
  		config = {};
  	}
  
  	// For easy configuration of buttons an array can be given
  	if ( $.isArray( config ) ) {
  		config = { buttons: config };
  	}
  
  	this.c = $.extend( true, {}, Buttons.defaults, config );
  
  	// Don't want a deep copy for the buttons
  	if ( config.buttons ) {
  		this.c.buttons = config.buttons;
  	}
  
  	this.s = {
  		dt: new DataTable.Api( dt ),
  		buttons: [],
  		listenKeys: '',
  		namespace: 'dtb'+(_instCounter++)
  	};
  
  	this.dom = {
  		container: $('<'+this.c.dom.container.tag+'/>')
  			.addClass( this.c.dom.container.className )
  	};
  
  	this._constructor();
  };
  
  
  $.extend( Buttons.prototype, {
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Public methods
  	 */
  
  	/**
  	 * Get the action of a button
  	 * @param  {int|string} Button index
  	 * @return {function}
  	 *//**
  	 * Set the action of a button
  	 * @param  {node} node Button element
  	 * @param  {function} action Function to set
  	 * @return {Buttons} Self for chaining
  	 */
  	action: function ( node, action )
  	{
  		var button = this._nodeToButton( node );
  
  		if ( action === undefined ) {
  			return button.conf.action;
  		}
  
  		button.conf.action = action;
  
  		return this;
  	},
  
  	/**
  	 * Add an active class to the button to make to look active or get current
  	 * active state.
  	 * @param  {node} node Button element
  	 * @param  {boolean} [flag] Enable / disable flag
  	 * @return {Buttons} Self for chaining or boolean for getter
  	 */
  	active: function ( node, flag ) {
  		var button = this._nodeToButton( node );
  		var klass = this.c.dom.button.active;
  		var jqNode = $(button.node);
  
  		if ( flag === undefined ) {
  			return jqNode.hasClass( klass );
  		}
  
  		jqNode.toggleClass( klass, flag === undefined ? true : flag );
  
  		return this;
  	},
  
  	/**
  	 * Add a new button
  	 * @param {object} config Button configuration object, base string name or function
  	 * @param {int|string} [idx] Button index for where to insert the button
  	 * @return {Buttons} Self for chaining
  	 */
  	add: function ( config, idx )
  	{
  		var buttons = this.s.buttons;
  
  		if ( typeof idx === 'string' ) {
  			var split = idx.split('-');
  			var base = this.s;
  
  			for ( var i=0, ien=split.length-1 ; i<ien ; i++ ) {
  				base = base.buttons[ split[i]*1 ];
  			}
  
  			buttons = base.buttons;
  			idx = split[ split.length-1 ]*1;
  		}
  
  		this._expandButton( buttons, config, false, idx );
  		this._draw();
  
  		return this;
  	},
  
  	/**
  	 * Get the container node for the buttons
  	 * @return {jQuery} Buttons node
  	 */
  	container: function ()
  	{
  		return this.dom.container;
  	},
  
  	/**
  	 * Disable a button
  	 * @param  {node} node Button node
  	 * @return {Buttons} Self for chaining
  	 */
  	disable: function ( node ) {
  		var button = this._nodeToButton( node );
  
  		$(button.node).addClass( this.c.dom.button.disabled );
  
  		return this;
  	},
  
  	/**
  	 * Destroy the instance, cleaning up event handlers and removing DOM
  	 * elements
  	 * @return {Buttons} Self for chaining
  	 */
  	destroy: function ()
  	{
  		// Key event listener
  		$('body').off( 'keyup.'+this.s.namespace );
  
  		// Individual button destroy (so they can remove their own events if
  		// needed). Take a copy as the array is modified by `remove`
  		var buttons = this.s.buttons.slice();
  		var i, ien;
  		
  		for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
  			this.remove( buttons[i].node );
  		}
  
  		// Container
  		this.dom.container.remove();
  
  		// Remove from the settings object collection
  		var buttonInsts = this.s.dt.settings()[0];
  
  		for ( i=0, ien=buttonInsts.length ; i<ien ; i++ ) {
  			if ( buttonInsts.inst === this ) {
  				buttonInsts.splice( i, 1 );
  				break;
  			}
  		}
  
  		return this;
  	},
  
  	/**
  	 * Enable / disable a button
  	 * @param  {node} node Button node
  	 * @param  {boolean} [flag=true] Enable / disable flag
  	 * @return {Buttons} Self for chaining
  	 */
  	enable: function ( node, flag )
  	{
  		if ( flag === false ) {
  			return this.disable( node );
  		}
  
  		var button = this._nodeToButton( node );
  		$(button.node).removeClass( this.c.dom.button.disabled );
  
  		return this;
  	},
  
  	/**
  	 * Get the instance name for the button set selector
  	 * @return {string} Instance name
  	 */
  	name: function ()
  	{
  		return this.c.name;
  	},
  
  	/**
  	 * Get a button's node of the buttons container if no button is given
  	 * @param  {node} [node] Button node
  	 * @return {jQuery} Button element, or container
  	 */
  	node: function ( node )
  	{
  		if ( ! node ) {
  			return this.dom.container;
  		}
  
  		var button = this._nodeToButton( node );
  		return $(button.node);
  	},
  
  	/**
  	 * Set / get a processing class on the selected button
  	 * @param  {boolean} flag true to add, false to remove, undefined to get
  	 * @return {boolean|Buttons} Getter value or this if a setter.
  	 */
  	processing: function ( node, flag )
  	{
  		var button = this._nodeToButton( node );
  
  		if ( flag === undefined ) {
  			return $(button.node).hasClass( 'processing' );
  		}
  
  		$(button.node).toggleClass( 'processing', flag );
  
  		return this;
  	},
  
  	/**
  	 * Remove a button.
  	 * @param  {node} node Button node
  	 * @return {Buttons} Self for chaining
  	 */
  	remove: function ( node )
  	{
  		var button = this._nodeToButton( node );
  		var host = this._nodeToHost( node );
  		var dt = this.s.dt;
  
  		// Remove any child buttons first
  		if ( button.buttons.length ) {
  			for ( var i=button.buttons.length-1 ; i>=0 ; i-- ) {
  				this.remove( button.buttons[i].node );
  			}
  		}
  
  		// Allow the button to remove event handlers, etc
  		if ( button.conf.destroy ) {
  			button.conf.destroy.call( dt.button(node), dt, $(node), button.conf );
  		}
  
  		this._removeKey( button.conf );
  
  		$(button.node).remove();
  
  		var idx = $.inArray( button, host );
  		host.splice( idx, 1 );
  
  		return this;
  	},
  
  	/**
  	 * Get the text for a button
  	 * @param  {int|string} node Button index
  	 * @return {string} Button text
  	 *//**
  	 * Set the text for a button
  	 * @param  {int|string|function} node Button index
  	 * @param  {string} label Text
  	 * @return {Buttons} Self for chaining
  	 */
  	text: function ( node, label )
  	{
  		var button = this._nodeToButton( node );
  		var buttonLiner = this.c.dom.collection.buttonLiner;
  		var linerTag = button.inCollection && buttonLiner && buttonLiner.tag ?
  			buttonLiner.tag :
  			this.c.dom.buttonLiner.tag;
  		var dt = this.s.dt;
  		var jqNode = $(button.node);
  		var text = function ( opt ) {
  			return typeof opt === 'function' ?
  				opt( dt, jqNode, button.conf ) :
  				opt;
  		};
  
  		if ( label === undefined ) {
  			return text( button.conf.text );
  		}
  
  		button.conf.text = label;
  
  		if ( linerTag ) {
  			jqNode.children( linerTag ).html( text(label) );
  		}
  		else {
  			jqNode.html( text(label) );
  		}
  
  		return this;
  	},
  
  
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Constructor
  	 */
  
  	/**
  	 * Buttons constructor
  	 * @private
  	 */
  	_constructor: function ()
  	{
  		var that = this;
  		var dt = this.s.dt;
  		var dtSettings = dt.settings()[0];
  		var buttons =  this.c.buttons;
  
  		if ( ! dtSettings._buttons ) {
  			dtSettings._buttons = [];
  		}
  
  		dtSettings._buttons.push( {
  			inst: this,
  			name: this.c.name
  		} );
  
  		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
  			this.add( buttons[i] );
  		}
  
  		dt.on( 'destroy', function ( e, settings ) {
  			if ( settings === dtSettings ) {
  				that.destroy();
  			}
  		} );
  
  		// Global key event binding to listen for button keys
  		$('body').on( 'keyup.'+this.s.namespace, function ( e ) {
  			if ( ! document.activeElement || document.activeElement === document.body ) {
  				// SUse a string of characters for fast lookup of if we need to
  				// handle this
  				var character = String.fromCharCode(e.keyCode).toLowerCase();
  
  				if ( that.s.listenKeys.toLowerCase().indexOf( character ) !== -1 ) {
  					that._keypress( character, e );
  				}
  			}
  		} );
  	},
  
  
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Private methods
  	 */
  
  	/**
  	 * Add a new button to the key press listener
  	 * @param {object} conf Resolved button configuration object
  	 * @private
  	 */
  	_addKey: function ( conf )
  	{
  		if ( conf.key ) {
  			this.s.listenKeys += $.isPlainObject( conf.key ) ?
  				conf.key.key :
  				conf.key;
  		}
  	},
  
  	/**
  	 * Insert the buttons into the container. Call without parameters!
  	 * @param  {node} [container] Recursive only - Insert point
  	 * @param  {array} [buttons] Recursive only - Buttons array
  	 * @private
  	 */
  	_draw: function ( container, buttons )
  	{
  		if ( ! container ) {
  			container = this.dom.container;
  			buttons = this.s.buttons;
  		}
  
  		container.children().detach();
  
  		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
  			container.append( buttons[i].inserter );
  			container.append( ' ' );
  
  			if ( buttons[i].buttons && buttons[i].buttons.length ) {
  				this._draw( buttons[i].collection, buttons[i].buttons );
  			}
  		}
  	},
  
  	/**
  	 * Create buttons from an array of buttons
  	 * @param  {array} attachTo Buttons array to attach to
  	 * @param  {object} button Button definition
  	 * @param  {boolean} inCollection true if the button is in a collection
  	 * @private
  	 */
  	_expandButton: function ( attachTo, button, inCollection, attachPoint )
  	{
  		var dt = this.s.dt;
  		var buttonCounter = 0;
  		var buttons = ! $.isArray( button ) ?
  			[ button ] :
  			button;
  
  		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
  			var conf = this._resolveExtends( buttons[i] );
  
  			if ( ! conf ) {
  				continue;
  			}
  
  			// If the configuration is an array, then expand the buttons at this
  			// point
  			if ( $.isArray( conf ) ) {
  				this._expandButton( attachTo, conf, inCollection, attachPoint );
  				continue;
  			}
  
  			var built = this._buildButton( conf, inCollection );
  			if ( ! built ) {
  				continue;
  			}
  
  			if ( attachPoint !== undefined ) {
  				attachTo.splice( attachPoint, 0, built );
  				attachPoint++;
  			}
  			else {
  				attachTo.push( built );
  			}
  
  			if ( built.conf.buttons ) {
  				var collectionDom = this.c.dom.collection;
  				built.collection = $('<'+collectionDom.tag+'/>')
  					.addClass( collectionDom.className )
  					.attr( 'role', 'menu' ) ;
  				built.conf._collection = built.collection;
  
  				this._expandButton( built.buttons, built.conf.buttons, true, attachPoint );
  			}
  
  			// init call is made here, rather than buildButton as it needs to
  			// be selectable, and for that it needs to be in the buttons array
  			if ( conf.init ) {
  				conf.init.call( dt.button( built.node ), dt, $(built.node), conf );
  			}
  
  			buttonCounter++;
  		}
  	},
  
  	/**
  	 * Create an individual button
  	 * @param  {object} config            Resolved button configuration
  	 * @param  {boolean} inCollection `true` if a collection button
  	 * @return {jQuery} Created button node (jQuery)
  	 * @private
  	 */
  	_buildButton: function ( config, inCollection )
  	{
  		var buttonDom = this.c.dom.button;
  		var linerDom = this.c.dom.buttonLiner;
  		var collectionDom = this.c.dom.collection;
  		var dt = this.s.dt;
  		var text = function ( opt ) {
  			return typeof opt === 'function' ?
  				opt( dt, button, config ) :
  				opt;
  		};
  
  		if ( inCollection && collectionDom.button ) {
  			buttonDom = collectionDom.button;
  		}
  
  		if ( inCollection && collectionDom.buttonLiner ) {
  			linerDom = collectionDom.buttonLiner;
  		}
  
  		// Make sure that the button is available based on whatever requirements
  		// it has. For example, Flash buttons require Flash
  		if ( config.available && ! config.available( dt, config ) ) {
  			return false;
  		}
  
  		var action = function ( e, dt, button, config ) {
  			config.action.call( dt.button( button ), e, dt, button, config );
  
  			$(dt.table().node()).triggerHandler( 'buttons-action.dt', [
  				dt.button( button ), dt, button, config 
  			] );
  		};
  
  		var tag = config.tag || buttonDom.tag;
  		var clickBlurs = config.clickBlurs === undefined ? true : config.clickBlurs
  		var button = $('<'+tag+'/>')
  			.addClass( buttonDom.className )
  			.attr( 'tabindex', this.s.dt.settings()[0].iTabIndex )
  			.attr( 'aria-controls', this.s.dt.table().node().id )
  			.on( 'click.dtb', function (e) {
  				e.preventDefault();
  
  				if ( ! button.hasClass( buttonDom.disabled ) && config.action ) {
  					action( e, dt, button, config );
  				}
  				if( clickBlurs ) {
  					button.blur();
  				}
  			} )
  			.on( 'keyup.dtb', function (e) {
  				if ( e.keyCode === 13 ) {
  					if ( ! button.hasClass( buttonDom.disabled ) && config.action ) {
  						action( e, dt, button, config );
  					}
  				}
  			} );
  
  		// Make `a` tags act like a link
  		if ( tag.toLowerCase() === 'a' ) {
  			button.attr( 'href', '#' );
  		}
  
  		// Button tags should have `type=button` so they don't have any default behaviour
  		if ( tag.toLowerCase() === 'button' ) {
  			button.attr( 'type', 'button' );
  		}
  
  		if ( linerDom.tag ) {
  			var liner = $('<'+linerDom.tag+'/>')
  				.html( text( config.text ) )
  				.addClass( linerDom.className );
  
  			if ( linerDom.tag.toLowerCase() === 'a' ) {
  				liner.attr( 'href', '#' );
  			}
  
  			button.append( liner );
  		}
  		else {
  			button.html( text( config.text ) );
  		}
  
  		if ( config.enabled === false ) {
  			button.addClass( buttonDom.disabled );
  		}
  
  		if ( config.className ) {
  			button.addClass( config.className );
  		}
  
  		if ( config.titleAttr ) {
  			button.attr( 'title', text( config.titleAttr ) );
  		}
  
  		if ( config.attr ) {
  			button.attr( config.attr );
  		}
  
  		if ( ! config.namespace ) {
  			config.namespace = '.dt-button-'+(_buttonCounter++);
  		}
  
  		var buttonContainer = this.c.dom.buttonContainer;
  		var inserter;
  		if ( buttonContainer && buttonContainer.tag ) {
  			inserter = $('<'+buttonContainer.tag+'/>')
  				.addClass( buttonContainer.className )
  				.append( button );
  		}
  		else {
  			inserter = button;
  		}
  
  		this._addKey( config );
  
  		// Style integration callback for DOM manipulation
  		// Note that this is _not_ documented. It is currently
  		// for style integration only
  		if( this.c.buttonCreated ) {
  			inserter = this.c.buttonCreated( config, inserter );
  		}
  
  		return {
  			conf:         config,
  			node:         button.get(0),
  			inserter:     inserter,
  			buttons:      [],
  			inCollection: inCollection,
  			collection:   null
  		};
  	},
  
  	/**
  	 * Get the button object from a node (recursive)
  	 * @param  {node} node Button node
  	 * @param  {array} [buttons] Button array, uses base if not defined
  	 * @return {object} Button object
  	 * @private
  	 */
  	_nodeToButton: function ( node, buttons )
  	{
  		if ( ! buttons ) {
  			buttons = this.s.buttons;
  		}
  
  		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
  			if ( buttons[i].node === node ) {
  				return buttons[i];
  			}
  
  			if ( buttons[i].buttons.length ) {
  				var ret = this._nodeToButton( node, buttons[i].buttons );
  
  				if ( ret ) {
  					return ret;
  				}
  			}
  		}
  	},
  
  	/**
  	 * Get container array for a button from a button node (recursive)
  	 * @param  {node} node Button node
  	 * @param  {array} [buttons] Button array, uses base if not defined
  	 * @return {array} Button's host array
  	 * @private
  	 */
  	_nodeToHost: function ( node, buttons )
  	{
  		if ( ! buttons ) {
  			buttons = this.s.buttons;
  		}
  
  		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
  			if ( buttons[i].node === node ) {
  				return buttons;
  			}
  
  			if ( buttons[i].buttons.length ) {
  				var ret = this._nodeToHost( node, buttons[i].buttons );
  
  				if ( ret ) {
  					return ret;
  				}
  			}
  		}
  	},
  
  	/**
  	 * Handle a key press - determine if any button's key configured matches
  	 * what was typed and trigger the action if so.
  	 * @param  {string} character The character pressed
  	 * @param  {object} e Key event that triggered this call
  	 * @private
  	 */
  	_keypress: function ( character, e )
  	{
  		// Check if this button press already activated on another instance of Buttons
  		if ( e._buttonsHandled ) {
  			return;
  		}
  
  		var run = function ( conf, node ) {
  			if ( ! conf.key ) {
  				return;
  			}
  
  			if ( conf.key === character ) {
  				e._buttonsHandled = true;
  				$(node).click();
  			}
  			else if ( $.isPlainObject( conf.key ) ) {
  				if ( conf.key.key !== character ) {
  					return;
  				}
  
  				if ( conf.key.shiftKey && ! e.shiftKey ) {
  					return;
  				}
  
  				if ( conf.key.altKey && ! e.altKey ) {
  					return;
  				}
  
  				if ( conf.key.ctrlKey && ! e.ctrlKey ) {
  					return;
  				}
  
  				if ( conf.key.metaKey && ! e.metaKey ) {
  					return;
  				}
  
  				// Made it this far - it is good
  				e._buttonsHandled = true;
  				$(node).click();
  			}
  		};
  
  		var recurse = function ( a ) {
  			for ( var i=0, ien=a.length ; i<ien ; i++ ) {
  				run( a[i].conf, a[i].node );
  
  				if ( a[i].buttons.length ) {
  					recurse( a[i].buttons );
  				}
  			}
  		};
  
  		recurse( this.s.buttons );
  	},
  
  	/**
  	 * Remove a key from the key listener for this instance (to be used when a
  	 * button is removed)
  	 * @param  {object} conf Button configuration
  	 * @private
  	 */
  	_removeKey: function ( conf )
  	{
  		if ( conf.key ) {
  			var character = $.isPlainObject( conf.key ) ?
  				conf.key.key :
  				conf.key;
  
  			// Remove only one character, as multiple buttons could have the
  			// same listening key
  			var a = this.s.listenKeys.split('');
  			var idx = $.inArray( character, a );
  			a.splice( idx, 1 );
  			this.s.listenKeys = a.join('');
  		}
  	},
  
  	/**
  	 * Resolve a button configuration
  	 * @param  {string|function|object} conf Button config to resolve
  	 * @return {object} Button configuration
  	 * @private
  	 */
  	_resolveExtends: function ( conf )
  	{
  		var dt = this.s.dt;
  		var i, ien;
  		var toConfObject = function ( base ) {
  			var loop = 0;
  
  			// Loop until we have resolved to a button configuration, or an
  			// array of button configurations (which will be iterated
  			// separately)
  			while ( ! $.isPlainObject(base) && ! $.isArray(base) ) {
  				if ( base === undefined ) {
  					return;
  				}
  
  				if ( typeof base === 'function' ) {
  					base = base( dt, conf );
  
  					if ( ! base ) {
  						return false;
  					}
  				}
  				else if ( typeof base === 'string' ) {
  					if ( ! _dtButtons[ base ] ) {
  						throw 'Unknown button type: '+base;
  					}
  
  					base = _dtButtons[ base ];
  				}
  
  				loop++;
  				if ( loop > 30 ) {
  					// Protect against misconfiguration killing the browser
  					throw 'Buttons: Too many iterations';
  				}
  			}
  
  			return $.isArray( base ) ?
  				base :
  				$.extend( {}, base );
  		};
  
  		conf = toConfObject( conf );
  
  		while ( conf && conf.extend ) {
  			// Use `toConfObject` in case the button definition being extended
  			// is itself a string or a function
  			if ( ! _dtButtons[ conf.extend ] ) {
  				throw 'Cannot extend unknown button type: '+conf.extend;
  			}
  
  			var objArray = toConfObject( _dtButtons[ conf.extend ] );
  			if ( $.isArray( objArray ) ) {
  				return objArray;
  			}
  			else if ( ! objArray ) {
  				// This is a little brutal as it might be possible to have a
  				// valid button without the extend, but if there is no extend
  				// then the host button would be acting in an undefined state
  				return false;
  			}
  
  			// Stash the current class name
  			var originalClassName = objArray.className;
  
  			conf = $.extend( {}, objArray, conf );
  
  			// The extend will have overwritten the original class name if the
  			// `conf` object also assigned a class, but we want to concatenate
  			// them so they are list that is combined from all extended buttons
  			if ( originalClassName && conf.className !== originalClassName ) {
  				conf.className = originalClassName+' '+conf.className;
  			}
  
  			// Buttons to be added to a collection  -gives the ability to define
  			// if buttons should be added to the start or end of a collection
  			var postfixButtons = conf.postfixButtons;
  			if ( postfixButtons ) {
  				if ( ! conf.buttons ) {
  					conf.buttons = [];
  				}
  
  				for ( i=0, ien=postfixButtons.length ; i<ien ; i++ ) {
  					conf.buttons.push( postfixButtons[i] );
  				}
  
  				conf.postfixButtons = null;
  			}
  
  			var prefixButtons = conf.prefixButtons;
  			if ( prefixButtons ) {
  				if ( ! conf.buttons ) {
  					conf.buttons = [];
  				}
  
  				for ( i=0, ien=prefixButtons.length ; i<ien ; i++ ) {
  					conf.buttons.splice( i, 0, prefixButtons[i] );
  				}
  
  				conf.prefixButtons = null;
  			}
  
  			// Although we want the `conf` object to overwrite almost all of
  			// the properties of the object being extended, the `extend`
  			// property should come from the object being extended
  			conf.extend = objArray.extend;
  		}
  
  		return conf;
  	}
  } );
  
  
  
  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Statics
   */
  
  /**
   * Show / hide a background layer behind a collection
   * @param  {boolean} Flag to indicate if the background should be shown or
   *   hidden 
   * @param  {string} Class to assign to the background
   * @static
   */
  Buttons.background = function ( show, className, fade, insertPoint ) {
  	if ( fade === undefined ) {
  		fade = 400;
  	}
  	if ( ! insertPoint ) {
  		insertPoint = document.body;
  	}
  
  	if ( show ) {
  		$('<div/>')
  			.addClass( className )
  			.css( 'display', 'none' )
  			.insertAfter( insertPoint )
  			.stop()
  			.fadeIn( fade );
  	}
  	else {
  		$('div.'+className)
  			.stop()
  			.fadeOut( fade, function () {
  				$(this)
  					.removeClass( className )
  					.remove();
  			} );
  	}
  };
  
  /**
   * Instance selector - select Buttons instances based on an instance selector
   * value from the buttons assigned to a DataTable. This is only useful if
   * multiple instances are attached to a DataTable.
   * @param  {string|int|array} Instance selector - see `instance-selector`
   *   documentation on the DataTables site
   * @param  {array} Button instance array that was attached to the DataTables
   *   settings object
   * @return {array} Buttons instances
   * @static
   */
  Buttons.instanceSelector = function ( group, buttons )
  {
  	if ( ! group ) {
  		return $.map( buttons, function ( v ) {
  			return v.inst;
  		} );
  	}
  
  	var ret = [];
  	var names = $.map( buttons, function ( v ) {
  		return v.name;
  	} );
  
  	// Flatten the group selector into an array of single options
  	var process = function ( input ) {
  		if ( $.isArray( input ) ) {
  			for ( var i=0, ien=input.length ; i<ien ; i++ ) {
  				process( input[i] );
  			}
  			return;
  		}
  
  		if ( typeof input === 'string' ) {
  			if ( input.indexOf( ',' ) !== -1 ) {
  				// String selector, list of names
  				process( input.split(',') );
  			}
  			else {
  				// String selector individual name
  				var idx = $.inArray( $.trim(input), names );
  
  				if ( idx !== -1 ) {
  					ret.push( buttons[ idx ].inst );
  				}
  			}
  		}
  		else if ( typeof input === 'number' ) {
  			// Index selector
  			ret.push( buttons[ input ].inst );
  		}
  	};
  	
  	process( group );
  
  	return ret;
  };
  
  /**
   * Button selector - select one or more buttons from a selector input so some
   * operation can be performed on them.
   * @param  {array} Button instances array that the selector should operate on
   * @param  {string|int|node|jQuery|array} Button selector - see
   *   `button-selector` documentation on the DataTables site
   * @return {array} Array of objects containing `inst` and `idx` properties of
   *   the selected buttons so you know which instance each button belongs to.
   * @static
   */
  Buttons.buttonSelector = function ( insts, selector )
  {
  	var ret = [];
  	var nodeBuilder = function ( a, buttons, baseIdx ) {
  		var button;
  		var idx;
  
  		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
  			button = buttons[i];
  
  			if ( button ) {
  				idx = baseIdx !== undefined ?
  					baseIdx+i :
  					i+'';
  
  				a.push( {
  					node: button.node,
  					name: button.conf.name,
  					idx:  idx
  				} );
  
  				if ( button.buttons ) {
  					nodeBuilder( a, button.buttons, idx+'-' );
  				}
  			}
  		}
  	};
  
  	var run = function ( selector, inst ) {
  		var i, ien;
  		var buttons = [];
  		nodeBuilder( buttons, inst.s.buttons );
  
  		var nodes = $.map( buttons, function (v) {
  			return v.node;
  		} );
  
  		if ( $.isArray( selector ) || selector instanceof $ ) {
  			for ( i=0, ien=selector.length ; i<ien ; i++ ) {
  				run( selector[i], inst );
  			}
  			return;
  		}
  
  		if ( selector === null || selector === undefined || selector === '*' ) {
  			// Select all
  			for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
  				ret.push( {
  					inst: inst,
  					node: buttons[i].node
  				} );
  			}
  		}
  		else if ( typeof selector === 'number' ) {
  			// Main button index selector
  			ret.push( {
  				inst: inst,
  				node: inst.s.buttons[ selector ].node
  			} );
  		}
  		else if ( typeof selector === 'string' ) {
  			if ( selector.indexOf( ',' ) !== -1 ) {
  				// Split
  				var a = selector.split(',');
  
  				for ( i=0, ien=a.length ; i<ien ; i++ ) {
  					run( $.trim(a[i]), inst );
  				}
  			}
  			else if ( selector.match( /^\d+(\-\d+)*$/ ) ) {
  				// Sub-button index selector
  				var indexes = $.map( buttons, function (v) {
  					return v.idx;
  				} );
  
  				ret.push( {
  					inst: inst,
  					node: buttons[ $.inArray( selector, indexes ) ].node
  				} );
  			}
  			else if ( selector.indexOf( ':name' ) !== -1 ) {
  				// Button name selector
  				var name = selector.replace( ':name', '' );
  
  				for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
  					if ( buttons[i].name === name ) {
  						ret.push( {
  							inst: inst,
  							node: buttons[i].node
  						} );
  					}
  				}
  			}
  			else {
  				// jQuery selector on the nodes
  				$( nodes ).filter( selector ).each( function () {
  					ret.push( {
  						inst: inst,
  						node: this
  					} );
  				} );
  			}
  		}
  		else if ( typeof selector === 'object' && selector.nodeName ) {
  			// Node selector
  			var idx = $.inArray( selector, nodes );
  
  			if ( idx !== -1 ) {
  				ret.push( {
  					inst: inst,
  					node: nodes[ idx ]
  				} );
  			}
  		}
  	};
  
  
  	for ( var i=0, ien=insts.length ; i<ien ; i++ ) {
  		var inst = insts[i];
  
  		run( selector, inst );
  	}
  
  	return ret;
  };
  
  
  /**
   * Buttons defaults. For full documentation, please refer to the docs/option
   * directory or the DataTables site.
   * @type {Object}
   * @static
   */
  Buttons.defaults = {
  	buttons: [ 'copy', 'excel', 'csv', 'pdf', 'print' ],
  	name: 'main',
  	tabIndex: 0,
  	dom: {
  		container: {
  			tag: 'div',
  			className: 'dt-buttons'
  		},
  		collection: {
  			tag: 'div',
  			className: 'dt-button-collection'
  		},
  		button: {
  			// Flash buttons will not work with `<button>` in IE - it has to be `<a>`
  			tag: 'ActiveXObject' in window ?
  				'a' :
  				'button',
  			className: 'dt-button',
  			active: 'active',
  			disabled: 'disabled'
  		},
  		buttonLiner: {
  			tag: 'span',
  			className: ''
  		}
  	}
  };
  
  /**
   * Version information
   * @type {string}
   * @static
   */
  Buttons.version = '1.5.6';
  
  
  $.extend( _dtButtons, {
  	collection: {
  		text: function ( dt ) {
  			return dt.i18n( 'buttons.collection', 'Collection' );
  		},
  		className: 'buttons-collection',
  		init: function ( dt, button, config ) {
  			button.attr( 'aria-expanded', false );
  		},
  		action: function ( e, dt, button, config ) {
  			var close = function () {
  				dt.buttons( '[aria-haspopup="true"][aria-expanded="true"]' ).nodes().each( function() {
  					var collection = $(this).siblings('.dt-button-collection');
  
  					if ( collection.length ) {
  						collection.stop().fadeOut( config.fade, function () {
  							collection.detach();
  						} );
  					}
  
  					$(this).attr( 'aria-expanded', 'false' );
  				});
  
  				$('div.dt-button-background').off( 'click.dtb-collection' );
  				Buttons.background( false, config.backgroundClassName, config.fade, insertPoint );
  
  				$('body').off( '.dtb-collection' );
  				dt.off( 'buttons-action.b-internal' );
  			};
  
  			var wasExpanded = button.attr( 'aria-expanded' ) === 'true';
  
  			close();
  
  			if (!wasExpanded) {
  				var host = button;
  				var collectionParent = $(button).parents('div.dt-button-collection');
  				var hostPosition = host.position();
  				var tableContainer = $( dt.table().container() );
  				var multiLevel = false;
  				var insertPoint = host;
  
  				button.attr( 'aria-expanded', 'true' );
  
  				// Remove any old collection
  				if ( collectionParent.length ) {
  					multiLevel = $('.dt-button-collection').position();
  					insertPoint = collectionParent;
  					$('body').trigger( 'click.dtb-collection' );
  				}
  
  				if ( insertPoint.parents('body')[0] !== document.body ) {
  					insertPoint = document.body.lastChild;
  				}
  
  				config._collection.find('.dt-button-collection-title').remove();
  				config._collection.prepend('<div class="dt-button-collection-title">'+config.collectionTitle+'</div>');
  
  				config._collection
  					.addClass( config.collectionLayout )
  					.css( 'display', 'none' )
  					.insertAfter( insertPoint )
  					.stop()
  					.fadeIn( config.fade );
  
  				var position = config._collection.css( 'position' );
  
  				if ( multiLevel && position === 'absolute' ) {
  					config._collection.css( {
  						top: multiLevel.top,
  						left: multiLevel.left
  					} );
  				}
  				else if ( position === 'absolute' ) {
  					config._collection.css( {
  						top: hostPosition.top + host.outerHeight(),
  						left: hostPosition.left
  					} );
  
  					// calculate overflow when positioned beneath
  					var tableBottom = tableContainer.offset().top + tableContainer.height();
  					var listBottom = hostPosition.top + host.outerHeight() + config._collection.outerHeight();
  					var bottomOverflow = listBottom - tableBottom;
  
  					// calculate overflow when positioned above
  					var listTop = hostPosition.top - config._collection.outerHeight();
  					var tableTop = tableContainer.offset().top;
  					var topOverflow = tableTop - listTop;
  
  					// if bottom overflow is larger, move to the top because it fits better, or if dropup is requested
  					if (bottomOverflow > topOverflow || config.dropup) {
  						config._collection.css( 'top', hostPosition.top - config._collection.outerHeight() - 5);
  					}
  
  					// Right alignment is enabled on a class, e.g. bootstrap:
  					// $.fn.dataTable.Buttons.defaults.dom.collection.className += " dropdown-menu-right"; 
  					if ( config._collection.hasClass( config.rightAlignClassName ) ) {
  						config._collection.css( 'left', hostPosition.left + host.outerWidth() - config._collection.outerWidth() );
  					}
  
  					// Right alignment in table container
  					var listRight = hostPosition.left + config._collection.outerWidth();
  					var tableRight = tableContainer.offset().left + tableContainer.width();
  					if ( listRight > tableRight ) {
  						config._collection.css( 'left', hostPosition.left - ( listRight - tableRight ) );
  					}
  
  					// Right alignment to window
  					var listOffsetRight = host.offset().left + config._collection.outerWidth();
  					if ( listOffsetRight > $(window).width() ) {
  						config._collection.css( 'left', hostPosition.left - (listOffsetRight-$(window).width()) );
  					}
  				}
  				else {
  					// Fix position - centre on screen
  					var top = config._collection.height() / 2;
  					if ( top > $(window).height() / 2 ) {
  						top = $(window).height() / 2;
  					}
  
  					config._collection.css( 'marginTop', top*-1 );
  				}
  
  				if ( config.background ) {
  					Buttons.background( true, config.backgroundClassName, config.fade, insertPoint );
  				}
  
  				// Need to break the 'thread' for the collection button being
  				// activated by a click - it would also trigger this event
  				setTimeout( function () {
  					// This is bonkers, but if we don't have a click listener on the
  					// background element, iOS Safari will ignore the body click
  					// listener below. An empty function here is all that is
  					// required to make it work...
  					$('div.dt-button-background').on( 'click.dtb-collection', function () {} );
  
  					$('body')
  						.on( 'click.dtb-collection', function (e) {
  							// andSelf is deprecated in jQ1.8, but we want 1.7 compat
  							var back = $.fn.addBack ? 'addBack' : 'andSelf';
  
  							if ( ! $(e.target).parents()[back]().filter( config._collection ).length ) {
  								close();
  							}
  						} )
  						.on( 'keyup.dtb-collection', function (e) {
  							if ( e.keyCode === 27 ) {
  								close();
  							}
  						} );
  
  					if ( config.autoClose ) {
  						dt.on( 'buttons-action.b-internal', function () {
  							close();
  						} );
  					}
  				}, 10 );
  			}
  		},
  		background: true,
  		collectionLayout: '',
  		collectionTitle: '',
  		backgroundClassName: 'dt-button-background',
  		rightAlignClassName: 'dt-button-right',
  		autoClose: false,
  		fade: 400,
  		attr: {
  			'aria-haspopup': true
  		}
  	},
  	copy: function ( dt, conf ) {
  		if ( _dtButtons.copyHtml5 ) {
  			return 'copyHtml5';
  		}
  		if ( _dtButtons.copyFlash && _dtButtons.copyFlash.available( dt, conf ) ) {
  			return 'copyFlash';
  		}
  	},
  	csv: function ( dt, conf ) {
  		// Common option that will use the HTML5 or Flash export buttons
  		if ( _dtButtons.csvHtml5 && _dtButtons.csvHtml5.available( dt, conf ) ) {
  			return 'csvHtml5';
  		}
  		if ( _dtButtons.csvFlash && _dtButtons.csvFlash.available( dt, conf ) ) {
  			return 'csvFlash';
  		}
  	},
  	excel: function ( dt, conf ) {
  		// Common option that will use the HTML5 or Flash export buttons
  		if ( _dtButtons.excelHtml5 && _dtButtons.excelHtml5.available( dt, conf ) ) {
  			return 'excelHtml5';
  		}
  		if ( _dtButtons.excelFlash && _dtButtons.excelFlash.available( dt, conf ) ) {
  			return 'excelFlash';
  		}
  	},
  	pdf: function ( dt, conf ) {
  		// Common option that will use the HTML5 or Flash export buttons
  		if ( _dtButtons.pdfHtml5 && _dtButtons.pdfHtml5.available( dt, conf ) ) {
  			return 'pdfHtml5';
  		}
  		if ( _dtButtons.pdfFlash && _dtButtons.pdfFlash.available( dt, conf ) ) {
  			return 'pdfFlash';
  		}
  	},
  	pageLength: function ( dt ) {
  		var lengthMenu = dt.settings()[0].aLengthMenu;
  		var vals = $.isArray( lengthMenu[0] ) ? lengthMenu[0] : lengthMenu;
  		var lang = $.isArray( lengthMenu[0] ) ? lengthMenu[1] : lengthMenu;
  		var text = function ( dt ) {
  			return dt.i18n( 'buttons.pageLength', {
  				"-1": 'Show all rows',
  				_:    'Show %d rows'
  			}, dt.page.len() );
  		};
  
  		return {
  			extend: 'collection',
  			text: text,
  			className: 'buttons-page-length',
  			autoClose: true,
  			buttons: $.map( vals, function ( val, i ) {
  				return {
  					text: lang[i],
  					className: 'button-page-length',
  					action: function ( e, dt ) {
  						dt.page.len( val ).draw();
  					},
  					init: function ( dt, node, conf ) {
  						var that = this;
  						var fn = function () {
  							that.active( dt.page.len() === val );
  						};
  
  						dt.on( 'length.dt'+conf.namespace, fn );
  						fn();
  					},
  					destroy: function ( dt, node, conf ) {
  						dt.off( 'length.dt'+conf.namespace );
  					}
  				};
  			} ),
  			init: function ( dt, node, conf ) {
  				var that = this;
  				dt.on( 'length.dt'+conf.namespace, function () {
  					that.text( conf.text );
  				} );
  			},
  			destroy: function ( dt, node, conf ) {
  				dt.off( 'length.dt'+conf.namespace );
  			}
  		};
  	}
  } );
  
  
  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * DataTables API
   *
   * For complete documentation, please refer to the docs/api directory or the
   * DataTables site
   */
  
  // Buttons group and individual button selector
  DataTable.Api.register( 'buttons()', function ( group, selector ) {
  	// Argument shifting
  	if ( selector === undefined ) {
  		selector = group;
  		group = undefined;
  	}
  
  	this.selector.buttonGroup = group;
  
  	var res = this.iterator( true, 'table', function ( ctx ) {
  		if ( ctx._buttons ) {
  			return Buttons.buttonSelector(
  				Buttons.instanceSelector( group, ctx._buttons ),
  				selector
  			);
  		}
  	}, true );
  
  	res._groupSelector = group;
  	return res;
  } );
  
  // Individual button selector
  DataTable.Api.register( 'button()', function ( group, selector ) {
  	// just run buttons() and truncate
  	var buttons = this.buttons( group, selector );
  
  	if ( buttons.length > 1 ) {
  		buttons.splice( 1, buttons.length );
  	}
  
  	return buttons;
  } );
  
  // Active buttons
  DataTable.Api.registerPlural( 'buttons().active()', 'button().active()', function ( flag ) {
  	if ( flag === undefined ) {
  		return this.map( function ( set ) {
  			return set.inst.active( set.node );
  		} );
  	}
  
  	return this.each( function ( set ) {
  		set.inst.active( set.node, flag );
  	} );
  } );
  
  // Get / set button action
  DataTable.Api.registerPlural( 'buttons().action()', 'button().action()', function ( action ) {
  	if ( action === undefined ) {
  		return this.map( function ( set ) {
  			return set.inst.action( set.node );
  		} );
  	}
  
  	return this.each( function ( set ) {
  		set.inst.action( set.node, action );
  	} );
  } );
  
  // Enable / disable buttons
  DataTable.Api.register( ['buttons().enable()', 'button().enable()'], function ( flag ) {
  	return this.each( function ( set ) {
  		set.inst.enable( set.node, flag );
  	} );
  } );
  
  // Disable buttons
  DataTable.Api.register( ['buttons().disable()', 'button().disable()'], function () {
  	return this.each( function ( set ) {
  		set.inst.disable( set.node );
  	} );
  } );
  
  // Get button nodes
  DataTable.Api.registerPlural( 'buttons().nodes()', 'button().node()', function () {
  	var jq = $();
  
  	// jQuery will automatically reduce duplicates to a single entry
  	$( this.each( function ( set ) {
  		jq = jq.add( set.inst.node( set.node ) );
  	} ) );
  
  	return jq;
  } );
  
  // Get / set button processing state
  DataTable.Api.registerPlural( 'buttons().processing()', 'button().processing()', function ( flag ) {
  	if ( flag === undefined ) {
  		return this.map( function ( set ) {
  			return set.inst.processing( set.node );
  		} );
  	}
  
  	return this.each( function ( set ) {
  		set.inst.processing( set.node, flag );
  	} );
  } );
  
  // Get / set button text (i.e. the button labels)
  DataTable.Api.registerPlural( 'buttons().text()', 'button().text()', function ( label ) {
  	if ( label === undefined ) {
  		return this.map( function ( set ) {
  			return set.inst.text( set.node );
  		} );
  	}
  
  	return this.each( function ( set ) {
  		set.inst.text( set.node, label );
  	} );
  } );
  
  // Trigger a button's action
  DataTable.Api.registerPlural( 'buttons().trigger()', 'button().trigger()', function () {
  	return this.each( function ( set ) {
  		set.inst.node( set.node ).trigger( 'click' );
  	} );
  } );
  
  // Get the container elements
  DataTable.Api.registerPlural( 'buttons().containers()', 'buttons().container()', function () {
  	var jq = $();
  	var groupSelector = this._groupSelector;
  
  	// We need to use the group selector directly, since if there are no buttons
  	// the result set will be empty
  	this.iterator( true, 'table', function ( ctx ) {
  		if ( ctx._buttons ) {
  			var insts = Buttons.instanceSelector( groupSelector, ctx._buttons );
  
  			for ( var i=0, ien=insts.length ; i<ien ; i++ ) {
  				jq = jq.add( insts[i].container() );
  			}
  		}
  	} );
  
  	return jq;
  } );
  
  // Add a new button
  DataTable.Api.register( 'button().add()', function ( idx, conf ) {
  	var ctx = this.context;
  
  	// Don't use `this` as it could be empty - select the instances directly
  	if ( ctx.length ) {
  		var inst = Buttons.instanceSelector( this._groupSelector, ctx[0]._buttons );
  
  		if ( inst.length ) {
  			inst[0].add( conf, idx );
  		}
  	}
  
  	return this.button( this._groupSelector, idx );
  } );
  
  // Destroy the button sets selected
  DataTable.Api.register( 'buttons().destroy()', function () {
  	this.pluck( 'inst' ).unique().each( function ( inst ) {
  		inst.destroy();
  	} );
  
  	return this;
  } );
  
  // Remove a button
  DataTable.Api.registerPlural( 'buttons().remove()', 'buttons().remove()', function () {
  	this.each( function ( set ) {
  		set.inst.remove( set.node );
  	} );
  
  	return this;
  } );
  
  // Information box that can be used by buttons
  var _infoTimer;
  DataTable.Api.register( 'buttons.info()', function ( title, message, time ) {
  	var that = this;
  
  	if ( title === false ) {
  		$('#datatables_buttons_info').fadeOut( function () {
  			$(this).remove();
  		} );
  		clearTimeout( _infoTimer );
  		_infoTimer = null;
  
  		return this;
  	}
  
  	if ( _infoTimer ) {
  		clearTimeout( _infoTimer );
  	}
  
  	if ( $('#datatables_buttons_info').length ) {
  		$('#datatables_buttons_info').remove();
  	}
  
  	title = title ? '<h2>'+title+'</h2>' : '';
  
  	$('<div id="datatables_buttons_info" class="dt-button-info"/>')
  		.html( title )
  		.append( $('<div/>')[ typeof message === 'string' ? 'html' : 'append' ]( message ) )
  		.css( 'display', 'none' )
  		.appendTo( 'body' )
  		.fadeIn();
  
  	if ( time !== undefined && time !== 0 ) {
  		_infoTimer = setTimeout( function () {
  			that.buttons.info( false );
  		}, time );
  	}
  
  	return this;
  } );
  
  // Get data from the table for export - this is common to a number of plug-in
  // buttons so it is included in the Buttons core library
  DataTable.Api.register( 'buttons.exportData()', function ( options ) {
  	if ( this.context.length ) {
  		return _exportData( new DataTable.Api( this.context[0] ), options );
  	}
  } );
  
  // Get information about the export that is common to many of the export data
  // types (DRY)
  DataTable.Api.register( 'buttons.exportInfo()', function ( conf ) {
  	if ( ! conf ) {
  		conf = {};
  	}
  
  	return {
  		filename: _filename( conf ),
  		title: _title( conf ),
  		messageTop: _message(this, conf.message || conf.messageTop, 'top'),
  		messageBottom: _message(this, conf.messageBottom, 'bottom')
  	};
  } );
  
  
  
  /**
   * Get the file name for an exported file.
   *
   * @param {object}	config Button configuration
   * @param {boolean} incExtension Include the file name extension
   */
  var _filename = function ( config )
  {
  	// Backwards compatibility
  	var filename = config.filename === '*' && config.title !== '*' && config.title !== undefined && config.title !== null && config.title !== '' ?
  		config.title :
  		config.filename;
  
  	if ( typeof filename === 'function' ) {
  		filename = filename();
  	}
  
  	if ( filename === undefined || filename === null ) {
  		return null;
  	}
  
  	if ( filename.indexOf( '*' ) !== -1 ) {
  		filename = $.trim( filename.replace( '*', $('head > title').text() ) );
  	}
  
  	// Strip characters which the OS will object to
  	filename = filename.replace(/[^a-zA-Z0-9_\u00A1-\uFFFF\.,\-_ !\(\)]/g, "");
  
  	var extension = _stringOrFunction( config.extension );
  	if ( ! extension ) {
  		extension = '';
  	}
  
  	return filename + extension;
  };
  
  /**
   * Simply utility method to allow parameters to be given as a function
   *
   * @param {undefined|string|function} option Option
   * @return {null|string} Resolved value
   */
  var _stringOrFunction = function ( option )
  {
  	if ( option === null || option === undefined ) {
  		return null;
  	}
  	else if ( typeof option === 'function' ) {
  		return option();
  	}
  	return option;
  };
  
  /**
   * Get the title for an exported file.
   *
   * @param {object} config	Button configuration
   */
  var _title = function ( config )
  {
  	var title = _stringOrFunction( config.title );
  
  	return title === null ?
  		null : title.indexOf( '*' ) !== -1 ?
  			title.replace( '*', $('head > title').text() || 'Exported data' ) :
  			title;
  };
  
  var _message = function ( dt, option, position )
  {
  	var message = _stringOrFunction( option );
  	if ( message === null ) {
  		return null;
  	}
  
  	var caption = $('caption', dt.table().container()).eq(0);
  	if ( message === '*' ) {
  		var side = caption.css( 'caption-side' );
  		if ( side !== position ) {
  			return null;
  		}
  
  		return caption.length ?
  			caption.text() :
  			'';
  	}
  
  	return message;
  };
  
  
  
  
  
  
  
  var _exportTextarea = $('<textarea/>')[0];
  var _exportData = function ( dt, inOpts )
  {
  	var config = $.extend( true, {}, {
  		rows:           null,
  		columns:        '',
  		modifier:       {
  			search: 'applied',
  			order:  'applied'
  		},
  		orthogonal:     'display',
  		stripHtml:      true,
  		stripNewlines:  true,
  		decodeEntities: true,
  		trim:           true,
  		format:         {
  			header: function ( d ) {
  				return strip( d );
  			},
  			footer: function ( d ) {
  				return strip( d );
  			},
  			body: function ( d ) {
  				return strip( d );
  			}
  		},
  		customizeData: null
  	}, inOpts );
  
  	var strip = function ( str ) {
  		if ( typeof str !== 'string' ) {
  			return str;
  		}
  
  		// Always remove script tags
  		str = str.replace( /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi, '' );
  
  		// Always remove comments
  		str = str.replace( /<!\-\-.*?\-\->/g, '' );
  
  		if ( config.stripHtml ) {
  			str = str.replace( /<[^>]*>/g, '' );
  		}
  
  		if ( config.trim ) {
  			str = str.replace( /^\s+|\s+$/g, '' );
  		}
  
  		if ( config.stripNewlines ) {
  			str = str.replace( /\n/g, ' ' );
  		}
  
  		if ( config.decodeEntities ) {
  			_exportTextarea.innerHTML = str;
  			str = _exportTextarea.value;
  		}
  
  		return str;
  	};
  
  
  	var header = dt.columns( config.columns ).indexes().map( function (idx) {
  		var el = dt.column( idx ).header();
  		return config.format.header( el.innerHTML, idx, el );
  	} ).toArray();
  
  	var footer = dt.table().footer() ?
  		dt.columns( config.columns ).indexes().map( function (idx) {
  			var el = dt.column( idx ).footer();
  			return config.format.footer( el ? el.innerHTML : '', idx, el );
  		} ).toArray() :
  		null;
  	
  	// If Select is available on this table, and any rows are selected, limit the export
  	// to the selected rows. If no rows are selected, all rows will be exported. Specify
  	// a `selected` modifier to control directly.
  	var modifier = $.extend( {}, config.modifier );
  	if ( dt.select && typeof dt.select.info === 'function' && modifier.selected === undefined ) {
  		if ( dt.rows( config.rows, $.extend( { selected: true }, modifier ) ).any() ) {
  			$.extend( modifier, { selected: true } )
  		}
  	}
  
  	var rowIndexes = dt.rows( config.rows, modifier ).indexes().toArray();
  	var selectedCells = dt.cells( rowIndexes, config.columns );
  	var cells = selectedCells
  		.render( config.orthogonal )
  		.toArray();
  	var cellNodes = selectedCells
  		.nodes()
  		.toArray();
  
  	var columns = header.length;
  	var rows = columns > 0 ? cells.length / columns : 0;
  	var body = [];
  	var cellCounter = 0;
  
  	for ( var i=0, ien=rows ; i<ien ; i++ ) {
  		var row = [ columns ];
  
  		for ( var j=0 ; j<columns ; j++ ) {
  			row[j] = config.format.body( cells[ cellCounter ], i, j, cellNodes[ cellCounter ] );
  			cellCounter++;
  		}
  
  		body[i] = row;
  	}
  
  	var data = {
  		header: header,
  		footer: footer,
  		body:   body
  	};
  
  	if ( config.customizeData ) {
  		config.customizeData( data );
  	}
  
  	return data;
  };
  
  
  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * DataTables interface
   */
  
  // Attach to DataTables objects for global access
  $.fn.dataTable.Buttons = Buttons;
  $.fn.DataTable.Buttons = Buttons;
  
  
  
  // DataTables creation - check if the buttons have been defined for this table,
  // they will have been if the `B` option was used in `dom`, otherwise we should
  // create the buttons instance here so they can be inserted into the document
  // using the API. Listen for `init` for compatibility with pre 1.10.10, but to
  // be removed in future.
  $(document).on( 'init.dt plugin-init.dt', function (e, settings) {
  	if ( e.namespace !== 'dt' ) {
  		return;
  	}
  
  	var opts = settings.oInit.buttons || DataTable.defaults.buttons;
  
  	if ( opts && ! settings._buttons ) {
  		new Buttons( settings, opts ).container();
  	}
  } );
  
  function _init ( settings ) {
  	var api = new DataTable.Api( settings );
  	var opts = api.init().buttons || DataTable.defaults.buttons;
  
  	return new Buttons( api, opts ).container();
  }
  
  // DataTables `dom` feature option
  DataTable.ext.feature.push( {
  	fnInit: _init,
  	cFeature: "B"
  } );
  
  // DataTables 2 layout feature
  if ( DataTable.ext.features ) {
  	DataTable.ext.features.register( 'buttons', _init );
  }
  
  
  return Buttons;
  }));
  