(function($){
	var bigAutocomplete = new function(){
		this.currentInputText = null;//Ä¿Ç°»ñµÃ¹â±êµÄÊäÈë¿ò£¨½â¾öÒ»¸öÒ³Ãæ¶à¸öÊäÈë¿ò°ó¶¨×Ô¶¯²¹È«¹¦ÄÜ£©
		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];//¼üÅÌÉϹ¦Äܼü¼üÖµÊý×é
		this.holdText = null;//ÊäÈë¿òÖÐԭʼÊäÈëµÄÄÚÈÝ
		
		//³õʼ»¯²åÈë×Ô¶¯²¹È«div£¬²¢ÔÚdocument×¢²ámousedown£¬µã»÷·ÇdivÇøÓòÒþ²Ødiv
		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();
				}
			})
			
			//Êó±êÐüͣʱѡÖе±Ç°ÐÐ
			$("#bigAutocompleteContent").delegate("tr", "mouseover", function() {
				$("#bigAutocompleteContent tr").removeClass("ct");
				$(this).addClass("ct");
			}).delegate("tr", "mouseout", function() {
				$("#bigAutocompleteContent tr").removeClass("ct");
			});		
			
			
			//µ¥»÷Ñ¡ÖÐÐкó£¬Ñ¡ÖÐÐÐÄÚÈÝÉèÖõ½ÊäÈë¿òÖУ¬²¢Ö´ÐÐcallbackº¯Êý
			$("#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();//³õʼ»¯ÐÅÏ¢
			}			
			
			var $this = $(this);//Ϊ°ó¶¨×Ô¶¯²¹È«¹¦ÄܵÄÊäÈë¿òjquery¶ÔÏó
			
			var $bigAutocompleteContent = $("#bigAutocompleteContent");
			
			this.config = {
			               //width:ÏÂÀ­¿òµÄ¿í¶È£¬Ä¬ÈÏʹÓÃÊäÈë¿ò¿í¶È
			               width:$this.outerWidth() - 2,
			               //url£º¸ñʽurl:""ÓÃÀ´ajaxºǫ́»ñÈ¡Êý¾Ý£¬·µ»ØµÄÊý¾Ý¸ñʽΪdata²ÎÊýÒ»Ñù
			               url:null,
			               /*data£º¸ñʽ{data:[{title:null,result:{}},{title:null,result:{}}]}
			               urlºÍdata²ÎÊýÖ»ÓÐÒ»¸öÉúЧ£¬dataÓÅÏÈ*/
			               data:null,
			               //callback£ºÑ¡ÖÐÐк󰴻سµ»òµ¥»÷ʱ»Øµ÷µÄº¯Êý
			               callback:null};
			$.extend(this.config,param);
			
			$this.data("config",this.config);
			
			//ÊäÈë¿òkeydownʼþ
			$this.keydown(function(event) {
				switch (event.keyCode) {
				case 40://Ïòϼü
					
					if($bigAutocompleteContent.css("display") == "none")return;
					
					var $nextSiblingTr = $bigAutocompleteContent.find(".ct");
					if($nextSiblingTr.length <= 0){//ûÓÐÑ¡ÖÐÐÐʱ£¬Ñ¡ÖеÚÒ»ÐÐ
						$nextSiblingTr = $bigAutocompleteContent.find("tr:first");
					}else{
						$nextSiblingTr = $nextSiblingTr.next();
					}
					$bigAutocompleteContent.find("tr").removeClass("ct");
					
					if($nextSiblingTr.length > 0){//ÓÐÏÂÒ»ÐÐʱ£¨²»ÊÇ×îºóÒ»ÐУ©
						$nextSiblingTr.addClass("ct");//Ñ¡ÖеÄÐмӱ³¾°
						$this.val($nextSiblingTr.find("div:last").html());//Ñ¡ÖÐÐÐÄÚÈÝÉèÖõ½ÊäÈë¿òÖÐ
						
						//div¹ö¶¯µ½Ñ¡ÖеÄÐÐ,jquery-1.6.1 $nextSiblingTr.offset().top ÓÐbug£¬ÊýÖµÓÐÎÊÌâ
						$bigAutocompleteContent.scrollTop($nextSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $nextSiblingTr.height() );
						
					}else{
						$this.val(bigAutocomplete.holdText);//ÊäÈë¿òÏÔʾÓû§Ô­Ê¼ÊäÈëµÄÖµ
					}
					
					
					break;
				case 38://ÏòÉϼü
					if($bigAutocompleteContent.css("display") == "none")return;
					
					var $previousSiblingTr = $bigAutocompleteContent.find(".ct");
					if($previousSiblingTr.length <= 0){//ûÓÐÑ¡ÖÐÐÐʱ£¬Ñ¡ÖÐ×îºóÒ»ÐÐÐÐ
						$previousSiblingTr = $bigAutocompleteContent.find("tr:last");
					}else{
						$previousSiblingTr = $previousSiblingTr.prev();
					}
					$bigAutocompleteContent.find("tr").removeClass("ct");
					
					if($previousSiblingTr.length > 0){//ÓÐÉÏÒ»ÐÐʱ£¨²»ÊǵÚÒ»ÐУ©
						$previousSiblingTr.addClass("ct");//Ñ¡ÖеÄÐмӱ³¾°
						$this.val($previousSiblingTr.find("div:last").html());//Ñ¡ÖÐÐÐÄÚÈÝÉèÖõ½ÊäÈë¿òÖÐ
						
						//div¹ö¶¯µ½Ñ¡ÖеÄÐÐ,jquery-1.6.1 $$previousSiblingTr.offset().top ÓÐbug£¬ÊýÖµÓÐÎÊÌâ
						$bigAutocompleteContent.scrollTop($previousSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $previousSiblingTr.height());
					}else{
						$this.val(bigAutocomplete.holdText);//ÊäÈë¿òÏÔʾÓû§Ô­Ê¼ÊäÈëµÄÖµ
					}
					
					break;
				case 27://ESC¼üÒþ²ØÏÂÀ­¿ò
					
					bigAutocomplete.hideAutocomplete();
					break;
				}
			});		
			
			//ÊäÈë¿òkeyupʼþ
			$this.keyup(function(event) {
				var k = event.keyCode;
				var ctrl = event.ctrlKey;
				var isFunctionalKey = false;//°´ÏµļüÊÇ·ñÊǹ¦Äܼü
				for(var i=0;i<bigAutocomplete.functionalKeyArray.length;i++){
					if(k == bigAutocomplete.functionalKeyArray[i]){
						isFunctionalKey = true;
						break;
					}
				}
				//k¼üÖµ²»Êǹ¦Äܼü»òÊÇctrl+c¡¢ctrl+xʱ²Å´¥·¢×Ô¶¯²¹È«¹¦ÄÜ
				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 != ""){//ajaxÇëÇóÊý¾Ý
						$.post(url,{keyword:keyword_},function(result){
							makeContAndShow(result.data)
						},"json")
					}

					
					bigAutocomplete.holdText = $this.val();
				}
				//»Ø³µ¼ü
				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();						
					}
				}
				
			});	
			
					
			//×é×°ÏÂÀ­¿òhtmlÄÚÈݲ¢ÏÔʾ
			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();
				
				//ÿÐÐtr°ó¶¨Êý¾Ý£¬·µ»Ø¸ø»Øµ÷º¯Êý
				$bigAutocompleteContent.find("tr").each(function(index){
					$(this).data("jsonData",data_[index]);
				})
			}			
					
			
			//ÊäÈë¿òfocusʼþ
			$this.focus(function(){
				bigAutocomplete.currentInputText = $this;
			});
			
		}
		//Òþ²ØÏÂÀ­¿ò
		this.hideAutocomplete = function(){
			var $bigAutocompleteContent = $("#bigAutocompleteContent");
			if($bigAutocompleteContent.css("display") != "none"){
				$bigAutocompleteContent.find("tr").removeClass("ct");
				$bigAutocompleteContent.hide();
			}			
		}
		
	};
	
	
	$.fn.bigAutocomplete = bigAutocomplete.autocomplete;
	
})(jQuery)