jQuery(
    function ($) 
    {
	    $.fn.fcbkcomplete = function (opt) 
	    {
    		return this.each(function()
			{
		        function init()
		        {
		           createFCBK();       
	               preSet();
	               addInput(0); 
		        }
	        	
		        function createFCBK()
		        {	    
		           element.hide();
		           element.attr("multiple","multiple");
		           if (element.attr("name").indexOf("[]") == -1)
		           {
		           	   element.attr("name",element.attr("name")+"[]");
		           }
	        	   
		           holder = $(document.createElement("ul"));
	               holder.attr("class", "holder");
	               element.after(holder);
	               
	               complete = $(document.createElement("div"));
	               complete.addClass("facebook-auto");
	               complete.append('<div class="default">'+ options.complete_text +"</div>");
	               
				   if (browser_msie)
	               {
	                    complete.append('<iframe class="ie6fix" scrolling="no" frameborder="0"></iframe>');
	                    browser_msie_frame = complete.children('.ie6fix');
						//$("input:checkbox").parent().css("z-index","-1");
	               }
				   
	               feed = $(document.createElement("ul"));
	               feed.attr("id", elemid + "_feed");
	               
	               complete.prepend(feed);
	               holder.after(complete);
				   feed.css("width",complete.width());
		        }
	        	
		        function preSet()
		        {										
		            element.children("option").each( 
		                function(i,option) 
		                {									                    
							option = $(option);												
		                    if (option.hasClass("selected"))
		                    {																															
		                        addItem (option.text(), option.val(), true);
								option.attr("selected","selected");
		                    } 
							else
							{
								option.removeAttr("selected");	
							}

							cache.push({
								caption: option.text(),
								value: option.val()
							});
							search_string += "" + (cache.length - 1) + ":" + option.text() + ";";                
		                }
		            );
		        }
				
				//public method to add new item
				this.addItem = function(title, value)
				{
					addItem(title, value);
				}
	        	
		        function addItem (title, value, preadded)
		        {
	                var li = document.createElement("li");
	                var txt = document.createTextNode(title);
	                var aclose = document.createElement("a");       
	                
	                $(li).attr({"class": "bit-box","rel": value});
	                $(li).prepend(txt);        
	                $(aclose).attr({"class": "closebutton","href": "#"});
	                
	                li.appendChild(aclose);
	                holder.append(li);
	                
	                $(aclose).click(
	                    function(){
	                        $(this).parent("li").fadeOut("fast", 
	                            function(){
									removeItem($(this));	                                
	                            }
	                        );
	                        return false;
	                    }
	                );
	                
	                if (!preadded) 
	                {						
	                    $("#"+elemid + "_annoninput").remove();
						var _item;
	                    addInput(1);                        
	                    if (element.children("option[value=" + value + "]").length)
	                    {   
							_item = element.children("option[value=" + value + "]");            
	                        _item.get(0).setAttribute("selected", "selected");
							if (!_item.hasClass("selected")) 
							{
								_item.addClass("selected");
							}
	                    }
	                    else
	                    {
	                        var _item = $(document.createElement("option"));
	                        _item.attr("value", value).get(0).setAttribute("selected", "selected");
							_item.attr("value", value).addClass("selected");
	                        _item.text(title);              
	                        element.append(_item);
	                    }
						if (options.onselect.length)
						{
							funCall(options.onselect,_item)
						}	
	                }					     
	                holder.children("li.bit-box.deleted").removeClass("deleted");
	                feed.hide();
					browser_msie?browser_msie_frame.hide():'';
	            }
	        	
				function removeItem(item)
				{					
					if (options.onremove.length)
					{
					    var _item = element.children("option[value=" + item.attr("rel") + "]");
						funCall(options.onremove,_item)
					}
					element.children("option[value=" + item.attr("rel") + "]").removeAttr("selected");
					element.children("option[value=" + item.attr("rel") + "]").removeClass("selected");
                    item.remove();					
					deleting = 0;					
				}
				
		        function addInput(focusme)
		        {
		            var li = $(document.createElement("li"));
	                var input = $(document.createElement("input"));
	                
	                li.attr({"class": "bit-input","id": elemid + "_annoninput"});        
	                input.attr({"type": "text","class": "maininput","size": "1"});        
	                holder.append(li.append(input));
	                
	                input.focus(
	                    function()
	                    {
	                        complete.fadeIn("fast");
	                    }
	                );
	                
	                input.blur(
	                    function()
	                    {
	                        complete.fadeOut("fast");
	                    }
	                );
	                
	                holder.click(
	                    function()
	                    {
	                        input.focus();
				            if (feed.length && input.val().length) 
				            {
					            feed.show();
				            }
				            else 
				            {				
					            feed.hide();
								browser_msie?browser_msie_frame.hide():'';
					            complete.children(".default").show();
				            }
	                    }
	                );
	                
					input.keypress(
	                    function(event)
	                    {							
	                        if (event.keyCode == 13)
							{
							    return false;
							}
							//auto expand input							
							input.attr("size",input.val().length + 1);							
	                    }
	                );
					
					input.keydown(
	                    function(event)
	                    {							
							//prevent to enter some bad chars when input is empty
							if(event.keyCode == 191)
							{								
								event.preventDefault();
								return false;
							}	                       					
	                    }
	                );
					
	                input.keyup(
	                    function(event)
	                    {
							var etext = xssPrevent(input.val());
														
							if (event.keyCode == 8 && etext.length == 0)
							{			
								feed.hide();
								browser_msie?browser_msie_frame.hide():'';				
								if (holder.children("li.bit-box.deleted").length == 0) 
								{
									holder.children("li.bit-box:last").addClass("deleted");
									return false;
								}
								else 
								{
									if (deleting)
								    {
								        return;
								    }
									deleting = 1;
									holder.children("li.bit-box.deleted").fadeOut("fast", function()
									{
										removeItem($(this));
										return false;
									});
								}
							}
							
	                        if (event.keyCode != 40 && event.keyCode != 38 && etext.length != 0) 
	                        {
	                            counter = 0;									                            
								
	                            if (options.json_url) 
	                            {
	                                if (options.cache && json_cache) 
	                                {
	                                    addMembers(etext);
	                                    bindEvents();
	                                }
	                                else 
	                                {
	                                    $.getJSON(options.json_url + "?tag=" + etext, null, 
	                                        function(data)
	                                        {
	                                            addMembers(etext, data);
	                                            json_cache = true;
	                                            bindEvents();
	                                        }
	                                    );
	                                }
	                            }
	                            else 
	                            {
									addMembers(etext);
	                                bindEvents();
	                            }
	                            complete.children(".default").hide();
								feed.show();
	                        }
	                    }
	                );
					if (focusme)
					{
						setTimeout(function(){
							input.focus();
							complete.children(".default").show();
						},1);
					}						    
		        }
	        	
				function addMembers(etext, data)
				{
					feed.html('');
					
					if (!options.cache) 
					{
						cache = new Array();
						search_string = "";
					}
					
					addTextItem(etext);
					
					if (data != null && data.length)
					{
						$.each(data, 
	                    	function(i, val)
	                    	{
								cache.push (
									{
										caption: val.caption,
										value: val.value
									}
								);
								search_string += "" + (cache.length - 1) + ":" + val.caption + ";";
							}
						);	
					}
					
					var maximum = options.maxshownitems<cache.length?options.maxshownitems:cache.length;
					var filter = "i";
					if (options.filter_case)
					{
						filter = ""; 
					}
					
					var myregexp, match;
					try {
						myregexp = eval('/(?:^|;)\\s*(\\d+)\\s*:[^;]*?' + etext + '[^;]*/g' + filter);
						match = myregexp.exec(search_string);
					} catch(ex){};
										
					var content = '';
					while (match != null && maximum > 0) 
					{
						var id = match[1];						
						var object = cache[id];	
						if (options.filter_selected && element.children("option[value=" + object.value + "]").hasClass("selected")) 
						{
							//nothing here...
						}
						else 
						{
							content += '<li rel="' + object.value + '">' + itemIllumination(object.caption, etext) + '</li>';
							counter++;
							maximum--;
						}						
						match = myregexp.exec(search_string);
					}
					feed.append(content);
					
					if (options.firstselected)
					{
					    focuson = feed.children("li:visible:first");
					    focuson.addClass("auto-focus");
					}
					
					if (counter > options.height) 
	                {
	                    feed.css({"height": (options.height * 24) + "px","overflow": "auto"});
						if (browser_msie)
	                    {
	                        browser_msie_frame.css({"height": (options.height * 24) + "px", "width": feed.width() + "px"}).show();
	                    }
	                }
	                else 
	                {
	                    feed.css("height", "auto");
						if (browser_msie)
	                    {
	                        browser_msie_frame.css({"height": feed.height() + "px", "width": feed.width() + "px"}).show();
	                    }
	                }				
				}
				
				function itemIllumination(text, etext)
				{
					if (options.filter_case) 
                    {     
						try {
							eval("var text = text.replace(/(.*)(" + etext + ")(.*)/gi,'$1<em>$2</em>$3');");
						} catch(ex){};
                    }
                    else 
                    {    
						try {
							eval("var text = text.replace(/(.*)(" + etext.toLowerCase() + ")(.*)/gi,'$1<em>$2</em>$3');");
						}catch(ex){};
                    }					
					return text;
				}
	        	
		        function bindFeedEvent() 
		        {		
			        feed.children("li").mouseover(
			            function()
			            {
				            feed.children("li").removeClass("auto-focus");
	                        $(this).addClass("auto-focus");
	                        focuson = $(this);
	                    }
	                );
	        		
			        feed.children("li").mouseout(
			            function()
			            {
	                        $(this).removeClass("auto-focus");
	                        focuson = null;
	                    }
	                );
		        }
	        	
		        function removeFeedEvent() 
		        {       	
			        feed.children("li").unbind("mouseover");	
			        feed.children("li").unbind("mouseout");
			        feed.mousemove(
			            function () 
			            {
				            bindFeedEvent();
				            feed.unbind("mousemove");
			            }
			        );	
		        }
	        	
		        function bindEvents()
		        {
		            var maininput = $("#"+elemid + "_annoninput").children(".maininput");	                 	
	       	        bindFeedEvent();      	
	                feed.children("li").unbind("mousedown");        
	                feed.children("li").mousedown( 
	                    function()
	                    {
	                        var option = $(this);
	                        addItem(option.text(),option.attr("rel"));
	                        feed.hide();
							browser_msie?browser_msie_frame.hide():'';
	                        complete.hide();
	                    }
	                );
	                
	                maininput.unbind("keydown");
	                maininput.keydown(
	                    function(event)
	                    {		
							if(event.keyCode == 191)
							{								
								event.preventDefault();
								return false;
							}
												
							if (event.keyCode != 8) 
							{
								holder.children("li.bit-box.deleted").removeClass("deleted");
							}
							
	                        if (event.keyCode == 13 && checkFocusOn()) 
	                        {
	                            var option = focuson;
	                            addItem(option.text(), option.attr("rel"));
	                            complete.hide();
	                            event.preventDefault();
								focuson = null;
								return false;
	                        }
							
							if (event.keyCode == 13 && !checkFocusOn()) 
	                        {
								if (options.newel) 
								{
									var value = xssPrevent($(this).val());
									addItem(value, value);
									complete.hide();
									event.preventDefault();
									focuson = null;
								}
								return false;							
	                        }
	                        
	                        if (event.keyCode == 40) 
	                        {               
					            removeFeedEvent();
	                            if (focuson == null || focuson.length == 0) 
	                            {
	                                focuson = feed.children("li:visible:first");
						            feed.get(0).scrollTop = 0;
	                            }
	                            else 
	                            {
	                                focuson.removeClass("auto-focus");
	                                focuson = focuson.nextAll("li:visible:first");
						            var prev = parseInt(focuson.prevAll("li:visible").length,10);
						            var next = parseInt(focuson.nextAll("li:visible").length,10);
						            if ((prev > Math.round(options.height /2) || next <= Math.round(options.height /2)) && typeof(focuson.get(0)) != "undefined") 
						            {
							            feed.get(0).scrollTop = parseInt(focuson.get(0).scrollHeight,10) * (prev - Math.round(options.height /2));
						            }
	                            }
					            feed.children("li").removeClass("auto-focus");
	                            focuson.addClass("auto-focus");
	                        }
	                        if (event.keyCode == 38) 
	                        {
					            removeFeedEvent();
	                            if (focuson == null || focuson.length == 0) 
	                            {
	                                focuson = feed.children("li:visible:last");
						            feed.get(0).scrollTop = parseInt(focuson.get(0).scrollHeight,10) * (parseInt(feed.children("li:visible").length,10) - Math.round(options.height /2));
	                            }
	                            else 
	                            {
	                                focuson.removeClass("auto-focus");
	                                focuson = focuson.prevAll("li:visible:first");
						            var prev = parseInt(focuson.prevAll("li:visible").length,10);
						            var next = parseInt(focuson.nextAll("li:visible").length,10);
						            if ((next > Math.round(options.height /2) || prev <= Math.round(options.height /2)) && typeof(focuson.get(0)) != "undefined") 
						            {
							            feed.get(0).scrollTop = parseInt(focuson.get(0).scrollHeight,10) * (prev - Math.round(options.height /2));
						            }
	                            }
					            feed.children("li").removeClass("auto-focus");
	                            focuson.addClass("auto-focus");
	                        }													
	                    }
	                );
		        }
	        	
		        function addTextItem(value)
		        {					
	                if (options.newel) 
	                {
	                    feed.children("li[fckb=1]").remove();
	                    if (value.length == 0)
	                    {
	                    	return;
	                    }
	                    var li = $(document.createElement("li"));
	                    li.attr({"rel": value,"fckb": "1"}).html(value);
	                    feed.prepend(li);
				        counter++;
	                } else 
					{
						return;
					}
	            }
	        	
				function funCall(func,item)
				{	
					var _object = "";			
					for(i=0;i < item.get(0).attributes.length;i++)
					{	
						if (item.get(0).attributes[i].nodeValue != null) 
						{
							_object += "\"_" + item.get(0).attributes[i].nodeName + "\": \"" + item.get(0).attributes[i].nodeValue + "\",";
						}
					}
					_object = "{"+ _object + " notinuse: 0}";
					try {
						eval(func + "(" + _object + ")");
					}catch(ex){};
				}
				
				function checkFocusOn()
		        {
		            if (focuson == null)
		            {
		                return false;
		            }
		            if (focuson.length == 0)
		            {
		                return false;
		            }
		            return true;
		        }
				
				function xssPrevent(string)
                {					
                    string = string.replace(/[\"\'][\s]*javascript:(.*)[\"\']/g, "\"\"");
                    string = string.replace(/script(.*)/g, "");    
                    string = string.replace(/eval\((.*)\)/g, "");
                    string = string.replace('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/', '');
                    return string;
                }
				
		        var options = $.extend({
				        json_url: null,
				        cache: false,
				        height: "10",
				        newel: false,
						firstselected: false,
				        filter_case: false,
				        filter_hide: false,
				        complete_text: "etiket giriniz...",
						maxshownitems:  30,
						onselect: "",
						onremove: ""
			        }, opt);
	        	
		        //system variables
		        var holder     		= null;
		        var feed       		= null;
		        var complete   		= null;
		        var counter    		= 0;
		        var cache      		= new Array();
				var json_cache		= false;
				var search_string	= "";
		        var focuson    		= null;
	        	var deleting		= 0;
				var browser_msie	= "\v"=="v";
				var browser_msie_frame;
				
		        var element = $(this);
		        var elemid = element.attr("id");
		        init();

		        return this;
			});
	    };
    }
);