text: define([
  	"../core",
  	"../var/support"
  ], function( jQuery, support ) {
  
  (function() {
  	var pixelPositionVal, boxSizingReliableVal,
  		// Support: Firefox, Android 2.3 (Prefixed box-sizing versions).
  		divReset = "padding:0;margin:0;border:0;display:block;-webkit-box-sizing:content-box;" +
  			"-moz-box-sizing:content-box;box-sizing:content-box",
  		docElem = document.documentElement,
  		container = document.createElement( "div" ),
  		div = document.createElement( "div" );
  
  	div.style.backgroundClip = "content-box";
  	div.cloneNode( true ).style.backgroundClip = "";
  	support.clearCloneStyle = div.style.backgroundClip === "content-box";
  
  	container.style.cssText = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px;" +
  		"margin-top:1px";
  	container.appendChild( div );
  
  	// Executing both pixelPosition & boxSizingReliable tests require only one layout
  	// so they're executed at the same time to save the second computation.
  	function computePixelPositionAndBoxSizingReliable() {
  		// Support: Firefox, Android 2.3 (Prefixed box-sizing versions).
  		div.style.cssText = "-webkit-box-sizing:border-box;-moz-box-sizing:border-box;" +
  			"box-sizing:border-box;padding:1px;border:1px;display:block;width:4px;margin-top:1%;" +
  			"position:absolute;top:1%";
  		docElem.appendChild( container );
  
  		var divStyle = window.getComputedStyle( div, null );
  		pixelPositionVal = divStyle.top !== "1%";
  		boxSizingReliableVal = divStyle.width === "4px";
  
  		docElem.removeChild( container );
  	}
  
  	// Use window.getComputedStyle because jsdom on node.js will break without it.
  	if ( window.getComputedStyle ) {
  		jQuery.extend(support, {
  			pixelPosition: function() {
  				// This test is executed only once but we still do memoizing
  				// since we can use the boxSizingReliable pre-computing.
  				// No need to check if the test was already performed, though.
  				computePixelPositionAndBoxSizingReliable();
  				return pixelPositionVal;
  			},
  			boxSizingReliable: function() {
  				if ( boxSizingReliableVal == null ) {
  					computePixelPositionAndBoxSizingReliable();
  				}
  				return boxSizingReliableVal;
  			},
  			reliableMarginRight: function() {
  				// Support: Android 2.3
  				// Check if div with explicit width and no margin-right incorrectly
  				// gets computed margin-right based on width of container. (#3333)
  				// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
  				// This support function is only executed once so no memoizing is needed.
  				var ret,
  					marginDiv = div.appendChild( document.createElement( "div" ) );
  				marginDiv.style.cssText = div.style.cssText = divReset;
  				marginDiv.style.marginRight = marginDiv.style.width = "0";
  				div.style.width = "1px";
  				docElem.appendChild( container );
  
  				ret = !parseFloat( window.getComputedStyle( marginDiv, null ).marginRight );
  
  				docElem.removeChild( container );
  
  				// Clean up the div for other support tests.
  				div.innerHTML = "";
  
  				return ret;
  			}
  		});
  	}
  })();
  
  return support;
  
  });
  