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].title.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].title + "</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)