text: (function($){
  	var bigAutocomplete = new function(){
  		this.currentInputText = null;//目前获得光标的输入框（解决一个页面多个输入框绑定自动补全功能）
  		this.functionalKeyArray = [9,20,13,16,17,18,91,92,93,45,36,33,34,35,37,39,112,113,114,115,116,117,118,119,120,121,122,123,144,19,145,40,38,27];//键盘上功能键键值数组
  		this.holdText = null;//输入框中原始输入的内容
  		
  		//初始化插入自动补全div，并在document注册mousedown，点击非div区域隐藏div
  		this.init = function(){
  			$("body").append("<div id='bigAutocompleteContent' class='bigautocomplete-layout'></div>");
  			$(document).bind('mousedown',function(event){
  				var $target = $(event.target);
  				if((!($target.parents().andSelf().is('#bigAutocompleteContent'))) && (!$target.is(bigAutocomplete.currentInputText))){
  					bigAutocomplete.hideAutocomplete();
  				}
  			})
  			
  			//鼠标悬停时选中当前行
  			$("#bigAutocompleteContent").delegate("tr", "mouseover", function() {
  				$("#bigAutocompleteContent tr").removeClass("ct");
  				$(this).addClass("ct");
  			}).delegate("tr", "mouseout", function() {
  				$("#bigAutocompleteContent tr").removeClass("ct");
  			});		
  			
  			
  			//单击选中行后，选中行内容设置到输入框中，并执行callback函数
  			$("#bigAutocompleteContent").delegate("tr", "click", function() {
  				bigAutocomplete.currentInputText.val( $(this).find("div:last").html());
  				var callback_ = bigAutocomplete.currentInputText.data("config").callback;
  				if($("#bigAutocompleteContent").css("display") != "none" && callback_ && $.isFunction(callback_)){
  					callback_($(this).data("jsonData"));
  					
  				}				
  				bigAutocomplete.hideAutocomplete();
  			})			
  			
  		}
  		
  		this.autocomplete = function(param){
  			
  			if($("body").length > 0 && $("#bigAutocompleteContent").length <= 0){
  				bigAutocomplete.init();//初始化信息
  			}			
  			
  			var $this = $(this);//为绑定自动补全功能的输入框jquery对象
  			
  			var $bigAutocompleteContent = $("#bigAutocompleteContent");
  			
  			this.config = {
  			               //width:下拉框的宽度，默认使用输入框宽度
  			               width:$this.outerWidth() - 2,
  			               //url：格式url:""用来ajax后台获取数据，返回的数据格式为data参数一样
  			               url:null,
  			               /*data：格式{data:[{title:null,result:{}},{title:null,result:{}}]}
  			               url和data参数只有一个生效，data优先*/
  			               data:null,
  			               //callback：选中行后按回车或单击时回调的函数
  			               callback:null};
  			$.extend(this.config,param);
  			
  			$this.data("config",this.config);
  			
  			//输入框keydown事件
  			$this.keydown(function(event) {
  				switch (event.keyCode) {
  				case 40://向下键
  					
  					if($bigAutocompleteContent.css("display") == "none")return;
  					
  					var $nextSiblingTr = $bigAutocompleteContent.find(".ct");
  					if($nextSiblingTr.length <= 0){//没有选中行时，选中第一行
  						$nextSiblingTr = $bigAutocompleteContent.find("tr:first");
  					}else{
  						$nextSiblingTr = $nextSiblingTr.next();
  					}
  					$bigAutocompleteContent.find("tr").removeClass("ct");
  					
  					if($nextSiblingTr.length > 0){//有下一行时（不是最后一行）
  						$nextSiblingTr.addClass("ct");//选中的行加背景
  						$this.val($nextSiblingTr.find("div:last").html());//选中行内容设置到输入框中
  						
  						//div滚动到选中的行,jquery-1.6.1 $nextSiblingTr.offset().top 有bug，数值有问题
  						$bigAutocompleteContent.scrollTop($nextSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $nextSiblingTr.height() );
  						
  					}else{
  						$this.val(bigAutocomplete.holdText);//输入框显示用户原始输入的值
  					}
  					
  					
  					break;
  				case 38://向上键
  					if($bigAutocompleteContent.css("display") == "none")return;
  					
  					var $previousSiblingTr = $bigAutocompleteContent.find(".ct");
  					if($previousSiblingTr.length <= 0){//没有选中行时，选中最后一行行
  						$previousSiblingTr = $bigAutocompleteContent.find("tr:last");
  					}else{
  						$previousSiblingTr = $previousSiblingTr.prev();
  					}
  					$bigAutocompleteContent.find("tr").removeClass("ct");
  					
  					if($previousSiblingTr.length > 0){//有上一行时（不是第一行）
  						$previousSiblingTr.addClass("ct");//选中的行加背景
  						$this.val($previousSiblingTr.find("div:last").html());//选中行内容设置到输入框中
  						
  						//div滚动到选中的行,jquery-1.6.1 $$previousSiblingTr.offset().top 有bug，数值有问题
  						$bigAutocompleteContent.scrollTop($previousSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $previousSiblingTr.height());
  					}else{
  						$this.val(bigAutocomplete.holdText);//输入框显示用户原始输入的值
  					}
  					
  					break;
  				case 27://ESC键隐藏下拉框
  					
  					bigAutocomplete.hideAutocomplete();
  					break;
  				}
  			});		
  			
  			//输入框keyup事件
  			$this.keyup(function(event) {
  				var k = event.keyCode;
  				var ctrl = event.ctrlKey;
  				var isFunctionalKey = false;//按下的键是否是功能键
  				for(var i=0;i<bigAutocomplete.functionalKeyArray.length;i++){
  					if(k == bigAutocomplete.functionalKeyArray[i]){
  						isFunctionalKey = true;
  						break;
  					}
  				}
  				//k键值不是功能键或是ctrl+c、ctrl+x时才触发自动补全功能
  				if(!isFunctionalKey && (!ctrl || (ctrl && k == 67) || (ctrl && k == 88)) ){
  					var config = $this.data("config");
  					
  					var offset = $this.offset();
  					$bigAutocompleteContent.width(config.width);
  					var h = $this.outerHeight() - 1;
  					$bigAutocompleteContent.css({"top":offset.top + h,"left":offset.left});
  					
  					var data = config.data;
  					var url = config.url;
  					var keyword_ = $.trim($this.val());
  					if(keyword_ == null || keyword_ == ""){
  						bigAutocomplete.hideAutocomplete();
  						return;
  					}					
  					if(data != null && $.isArray(data) ){
  						var data_ = new Array();
  						for(var i=0;i<data.length;i++){
  							if(data[i].indexOf(keyword_) > -1){
  								data_.push(data[i]);
  							}
  						}
  						
  						makeContAndShow(data_);
  					}else if(url != null && url != ""){//ajax请求数据
  						$.post(url,{keyword:keyword_},function(result){
  							makeContAndShow(result.data)
  						},"json")
  					}
  
  					
  					bigAutocomplete.holdText = $this.val();
  				}
  				//回车键
  				if(k == 13){
  					var callback_ = $this.data("config").callback;
  					if($bigAutocompleteContent.css("display") != "none"){
  						if(callback_ && $.isFunction(callback_)){
  							callback_($bigAutocompleteContent.find(".ct").data("jsonData"));
  						}
  						$bigAutocompleteContent.hide();						
  					}
  				}
  				
  			});	
  			
  					
  			//组装下拉框html内容并显示
  			function makeContAndShow(data_){
  				if(data_ == null || data_.length <=0 ){
  					return;
  				}
  				
  				var cont = "<table><tbody>";
  				for(var i=0;i<data_.length;i++){
  					cont += "<tr><td><div>" + data_[i] + "</div></td></tr>"
  				}
  				cont += "</tbody></table>";
  				$bigAutocompleteContent.html(cont);
  				$bigAutocompleteContent.show();
  				
  				//每行tr绑定数据，返回给回调函数
  				$bigAutocompleteContent.find("tr").each(function(index){
  					$(this).data("jsonData",data_[index]);
  				})
  			}			
  					
  			
  			//输入框focus事件
  			$this.focus(function(){
  				bigAutocomplete.currentInputText = $this;
  			});
  			
  		}
  		//隐藏下拉框
  		this.hideAutocomplete = function(){
  			var $bigAutocompleteContent = $("#bigAutocompleteContent");
  			if($bigAutocompleteContent.css("display") != "none"){
  				$bigAutocompleteContent.find("tr").removeClass("ct");
  				$bigAutocompleteContent.hide();
  			}			
  		}
  		
  	};
  	
  	
  	$.fn.bigAutocomplete = bigAutocomplete.autocomplete;
  	
  })(jQuery)