jQuery.autocomplete = function(input, options) {
	// Create a link to self
	var me = this;

	// Create jQuery object for input element
	var $input = $(input).attr("autocomplete", "off");

	// Apply inputClass if necessary
	if (options.inputClass) $input.addClass(options.inputClass);

	// Create results
	var results = document.createElement("div");
	// Create jQuery object for results
	var $results = $(results);
	$results.hide().addClass(options.resultsClass).css("position", "absolute");
	if( options.width > 0 ) $results.css("width", options.width);

	// Add to body element
	$("body").append(results);

	input.autocompleter = me;

	var timeout = null;
	var prev = "";
	var active = -1;
	var cache = {};
	var keyb = false;
	var hasFocus = false;
	var lastKeyPressCode = null;

	// flush cache
	function flushCache(){
		cache = {};
		cache.data = {};
		cache.length = 0;
	};

	// flush cache
	flushCache();

	// if there is a data array supplied
	if( options.data != null ){
		var sFirstChar = "", stMatchSets = {}, row = [];

		// no url was specified, we need to adjust the cache length to make sure it fits the local data store
		if( typeof options.url != "string" ) options.cacheLength = 1;

		// loop through the array and create a lookup structure
		for( var i=0; i < options.data.length; i++ ){
			// if row is a string, make an array otherwise just reference the array
			row = ((typeof options.data[i] == "string") ? [options.data[i]] : options.data[i]);

			// if the length is zero, don't add to list
			if( row[0].length > 0 ){
				// get the first character
				sFirstChar = row[0].substring(0, 1).toLowerCase();
				// if no lookup array for this character exists, look it up now
				if( !stMatchSets[sFirstChar] ) stMatchSets[sFirstChar] = [];
				// if the match is a string
				stMatchSets[sFirstChar].push(row);
			}
		}

		// add the data items to the cache
		for( var k in stMatchSets ){
			// increase the cache size
			options.cacheLength++;
			// add to the cache
			addToCache(k, stMatchSets[k]);
		}
	}

	$input
	.keydown(function(e) {
        
        if (lastKeyPressCode == 32){ //Space
        
        }
        
        
		// track last key pressed
		lastKeyPressCode = e.keyCode;
        
		switch(e.keyCode) {
			case 38: // up
				e.preventDefault();
				moveSelect(-1);
				break;
			case 40: // down
				e.preventDefault();
				moveSelect(1);
				break;
			case 9:  // tab
			case 13: // return
			    var li = selectCurrent();
				if(li){
					// make sure to blur off the current field
					$input.get(0).blur();			
						
					$(li).find("a").bind("click", 
					  function(){ 
					    window.location = $(this).attr("href"); 
					  });
					  
					$(li).find("a").trigger("click");
											
					e.preventDefault();														
				}
				break;
			case 32: //Spacebar
			 if (timeout) clearTimeout(timeout);
			 onChange();
			break;
			case 27: //esc
			    if ($results.is(":visible")){	
			    	if (timeout) clearTimeout(timeout);								    		    			     
			          hideResults();			        
			            e.preventDefault();
			            e.stopPropagation();			
			    }
			break;
			default:			    
				active = -1;
				if (timeout) clearTimeout(timeout);					
				timeout = setTimeout(function(){onChange();}, options.delay);
			break;
		}
	})
	.focus(function(){
		// track whether the field has focus, we shouldn't process any results if the field no longer has focus
		hasFocus = true;
	})
	.blur(function() {
		// track whether the field has focus
		hasFocus = false;
		hideResults();
	});

	hideResultsNow();
    
	function onChange() {
		// ignore if the following keys are pressed: [del] [shift] [capslock]
		if( lastKeyPressCode == 46 || (lastKeyPressCode > 8 && lastKeyPressCode < 32) ) return $results.hide();
		var v = $input.val();
		if (v == prev) return;
		prev = v;
		if (v.length >= options.minChars) {
			$results.addClass(options.loadingClass);
			requestData(v);
		} else {
			$results.removeClass(options.loadingClass);
			$results.hide();
		}
	};

    // Returns false if key is in ignoreKeys array. Used to prevent keys like shift from triggering the onChange;
    function invalidKey(keyCode)
    {
        var ignoreKeys = new Array(8,9,13,16,17,18,19,20,27,33,34,35,36,37,38,39,40,45,46,112,113,114,115,116,117,118,119,120,121,122,123,144,145);
        
        for (var i = 0; i <= ignoreKeys.length; i++)
        {            
            if (keyCode == ignoreKeys[i])             
               return true;
        }
        
        return false;    
    }
    
    
 	function moveSelect(step) {

		var lis = $("li", results);
		if (!lis) return;

		active += step;

		if (active < 0) {
			active = 0;
		} else if (active >= lis.size()) {
			active = lis.size() - 1;
		}

		lis.removeClass("ac_over");

		$(lis[active]).addClass("ac_over");
        
        
		// Weird behaviour in IE
		// - Possibly a CSS issue. Works fine imo. jkappers
		if (lis[active]) {		
		    var $li = $(lis[active]);
		    /*
		    var data = {
		        Position: $li.position(),
		        Scroll: $results.scrollTop()		        		    
		    };
		
		    alert("offset: " + data.Position.top + "; scroll:" + data.Scroll);		    
		    */
		}

	};
        
	function selectCurrent() {
		var li = $("li.ac_over", results)[0];
		if (!li) {
			var $li = $("li", results);
			if (options.selectOnly) {
				if ($li.length == 1) li = $li[0];
			} else if (options.selectFirst) {
				li = $li[0];
			}
		}
		if (li) {
			selectItem(li);
			return li;
		} else {
			return li;
		}
	};

	function selectItem(li) {
		if (!li) {
			li = document.createElement("li");
			li.extra = [];
			li.selectValue = "";
		}
		var v = $.trim(li.selectValue ? li.selectValue : li.innerHTML);
		input.lastSelected = v;
		prev = v;
		//$results.html("");
		$input.val(v);
		hideResultsNow();
		if (options.onItemSelect) setTimeout(function() { options.onItemSelect(li) }, 1);				
		return false;
	};

	

	// selects a portion of the input string
	function createSelection(start, end){
		// get a reference to the input element
		var field = $input.get(0);
		if( field.createTextRange ){
			var selRange = field.createTextRange();
			selRange.collapse(true);
			selRange.moveStart("character", start);
			selRange.moveEnd("character", end);
			selRange.select();
		} else if( field.setSelectionRange ){
			field.setSelectionRange(start, end);
		} else {
			if( field.selectionStart ){
				field.selectionStart = start;
				field.selectionEnd = end;
			}
		}
		field.focus();
	};

	// fills in the input box w/the first match (assumed to be the best match)
	function autoFill(sValue){
		// if the last user key pressed was backspace, don't autofill
		if( lastKeyPressCode != 8 ){
			// fill in the value (keep the case the user has typed)
			$input.val($input.val() + sValue.substring(prev.length));
			// select the portion of the value not typed by the user (so the next character will erase)
			createSelection(prev.length, sValue.length);
		}
	};

	function showResults() {
		// get the position of the input field right now (in case the DOM is shifted)
		var pos = findPos(input);
		// either use the specified width, or autocalculate based on form element
		var iWidth = (options.width > 0) ? options.width : $input.outerWidth();
		// reposition
		$results.css({
			width: parseInt(iWidth) + "px",
			top: (pos.y + input.offsetHeight) + "px",
			left: pos.x + "px"
		}).show();
	};

	function hideResults() {
		if (timeout) clearTimeout(timeout);
		timeout = setTimeout(hideResultsNow, 200);
	};

	function hideResultsNow() {
		if (timeout) clearTimeout(timeout);
		$input.removeClass(options.loadingClass);
		if ($results.is(":visible")) {
			$results.hide();
		}
		if (options.mustMatch) {
			var v = $input.val();
			if (v != input.lastSelected) {
				selectItem(null);
			}
		}
	};

	function receiveData(q, data) {
		if (data) {
			$input.removeClass(options.loadingClass);
			results.innerHTML = "";

			// if the field no longer has focus or if there are no matches, do not display the drop down
			if( !hasFocus ) return hideResultsNow();

			if ($.browser.msie) {
				// we put a styled iframe behind the calendar so HTML SELECT elements don't show through
				$results.append(document.createElement('iframe'));
			}
			results.appendChild(dataToDom(data));
			// autofill in the complete box w/the first match as long as the user hasn't entered in more data
			if( options.autoFill && ($input.val().toLowerCase() == q.toLowerCase()) ) autoFill(data[0][0]);
			showResults();
		} else {		    
			hideResultsNow();
		}
	};
    
	function noResultsMessage(data) {
		alert('rar');
		return "<div>d</div>";
	};
	    
   	// Parse XML Response to custom format.
	function parseXmlData(data) {	    
		if ($(data).find("SearchPost").length <= 0) return null;

		var parsed = [];
		
		$(data).find("SearchPost").each(function(){
            node = $(this);

            if(node){
              parsed[parsed.length] = 
                new Array(
                  node.find("Title").text(), 
                  node.find("PostID").text(), 
                  node.find("Relevance").text(),
                  node.find("PostStatus").text(),
                  node.find("URL").text(),
                  node.find("ThreadStatus").text()                                    
                );  
            }            
        });
                
		return parsed;
	};
		
	// Parse JSON Response to custom format.
	function parseJsonData(data) {
        if (!data) return null;
    	 
        var parsed = [];
            	 
        for (i=0; i <= data.length; i++){

          node = data[i];
    	    
          if (node){
            parsed[parsed.length] = 
              new Array(
                node.Title,
                node.PostID,
                node.Relevance,
                node.PostStatus,
                node.URL,
                node.ThreadStatus                
              );	  
         }}
    	    
      return parsed;
	};

	function dataToDom(data) {		
		var num = data.length;

		// limited results to a max number
		if( (options.maxItemsToShow > 0) && (options.maxItemsToShow < num) ) num = options.maxItemsToShow;

        // If there are some records
        if ( num != 0 ){
        	var ul = document.createElement("ul");

		    for (var i=0; i < num; i++) {
			    var row = data[i];
			    if (!row) continue;
			    var li = document.createElement("li");
			    if (options.formatItem) {
				    li.innerHTML = options.formatItem(row, i, num);
				    li.selectValue = row[0];
			    } else {
				    li.innerHTML = row[0];
				    li.selectValue = row[0];
			    }
			    var extra = null;
			    if (row.length > 1) {
				    extra = [];
				    for (var j=1; j < row.length; j++) {
					    extra[extra.length] = row[j];
				    }
			    }
			    li.extra = extra;
			    ul.appendChild(li);
			    $(li).hover(
				    function() { $("li", ul).removeClass("ac_over"); $(this).addClass("ac_over"); active = $("li", ul).indexOf($(this).get(0)); },
				    function() { $(this).removeClass("ac_over"); }
			    ).click(function(e) { /*e.preventDefault();*/ e.stopPropagation(); selectItem(this) });
		    }
		    
		    return ul;
		}
		else
		{
		    // If there aren't any records
		    var span = document.createElement("span");
                span.innerHTML = options.noResultsMessage;                		    
		          $(span).addClass(options.noResultsClass);
            return span;
		}
	};

	function requestData(q) 
	{
		if (!options.matchCase) q = q.toLowerCase();
		var data = options.cacheLength ? loadFromCache(q) : null;
				
		// recieve the cached data
		if (data) {
			receiveData(q, data);
		// if an AJAX url has been supplied, try loading the data now
		} else if( (typeof options.url == "string") && (options.url.length > 0) ){		    
			callWebservice(q, encodeURI(options.maxItemsToShow));
		// if there's been no data found, remove the loading class
		} else {
			$input.removeClass(options.loadingClass);
		}
	};

    // Request data from SearchService via jQuery
    function callWebservice(q){
        $.get(makeUrl(q), 
          function(data) {
	        data = parseXmlData(data);
			  addToCache(q, data);
			  receiveData(q, data);
		  });
    } 
       
   	// Request data from SearchService via ASP.net Ajax
    function callWebservice(q, len){    
        ExchangeAnswers.Components.SearchExtensions.SearchService.GetRelatedForumPosts(len, q, 
          function(data){
			data = parseJsonData(data);
			addToCache(q, data);
			receiveData(q, data);                
          }
        );        
    };
    
    // Create url for GET request when calling webservice w/ JQuery
	function makeUrl(q) {
		var url = options.url + "?pageSize=" + encodeURI(options.maxItemsToShow);
		    url += "&subject=" + encodeURI(q);
		
		for (var i in options.extraParams) {
			url += "&" + i + "=" + encodeURI(options.extraParams[i]);
		}
		return url;
	};

	function loadFromCache(q) {
		if (!q) return null;		
		if (cache.data[q]) return cache.data[q];
		if (options.matchSubset) {
			for (var i = q.length - 1; i >= options.minChars; i--) {
				var qs = q.substr(0, i);
				var c = cache.data[qs];
				if (c) {
					var csub = [];
					for (var j = 0; j < c.length; j++) {
						var x = c[j];
						var x0 = x[0];
						if (matchTerm(x0, q)) { //Formerly matchSubset
							csub[csub.length] = x;
						}
					}
					return csub;
				}
			}
		}
		return null;
	};

    // Exact query matching
	function matchSubset(s, sub) {
		if (!options.matchCase) s = s.toLowerCase();
		var i = s.indexOf(sub);
		if (i == -1) return false;
		return i == 0 || options.matchContains;
	};

    // Term matching as opposed to exact query match.
	function matchTerm(s, sub) {	  
		if (!options.matchCase) s = s.toLowerCase();

		var match = false;		
		var term = sub.split(' ');
				
		  for(var i = 0; i < term.length; i++){		  
		     match = (s.indexOf(term[i]) != -1);		
		     if (!match) break;		      
		  }
				
		if (!match) return false;
		return match || options.matchContains;
	};
	
	this.flushCache = function() {
		flushCache();
	};

	this.setExtraParams = function(p) {
		options.extraParams = p;
	};

	this.findValue = function(){
		var q = $input.val();

		if (!options.matchCase) q = q.toLowerCase();
		var data = options.cacheLength ? loadFromCache(q) : null;
		if (data) {
			findValueCallback(q, data);
		} else if( (typeof options.url == "string") && (options.url.length > 0) ){
			callWebservice(q, encodeURI(options.maxItemsToShow));			
		} else {
			// no matches
			findValueCallback(q, null);
		}
	}

	function findValueCallback(q, data){

		if (data) $input.removeClass(options.loadingClass);

		var num = (data) ? data.length : 0;
		var li = null;

		for (var i=0; i < num; i++) {
			var row = data[i];            
            alert('t');
			if( row[0].toLowerCase() == q.toLowerCase() ){
				li = document.createElement("li");
				if (options.formatItem) {
					li.innerHTML = options.formatItem(row, i, num);
					li.selectValue = row[0];
				} else {
					li.innerHTML = row[0];
					li.selectValue = row[0];
				}
				var extra = null;
				if( row.length > 1 ){
					extra = [];
					for (var j=1; j < row.length; j++) {
						extra[extra.length] = row[j];
					}
				}
				li.extra = extra;
			}
		}

		if( options.onFindValue ) setTimeout(function() { options.onFindValue(li) }, 1);
	}

	function addToCache(q, data) {
		if (!data || !q || !options.cacheLength) return;
		if (!cache.length || cache.length > options.cacheLength) {
			flushCache();
			cache.length++;
		} else if (!cache[q]) {
			cache.length++;
		}
		cache.data[q] = data;
	};

	function findPos(obj) {
		var curleft = obj.offsetLeft || 0;
		var curtop = obj.offsetTop || 0;
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
		return {x:curleft,y:curtop};
	}
}

jQuery.fn.autocomplete = function(url, options, data) {
	// Make sure options exists
	options = options || {};
	// Set url as option
	options.url = url;
	// set some bulk local data
	options.data = ((typeof data == "object") && (data.constructor == Array)) ? data : null;

	// Set default values for required options
	options.inputClass = options.inputClass || "ac_input";
	options.resultsClass = options.resultsClass || "ac_results";
	options.lineSeparator = options.lineSeparator || "\n";
	options.cellSeparator = options.cellSeparator || "|";
	options.minChars = options.minChars || 1;
	options.delay = options.delay || 400;
	options.matchCase = options.matchCase || 0;
	options.matchSubset = options.matchSubset || 1;
	options.matchContains = options.matchContains || 0;
	options.cacheLength = options.cacheLength || null; //Formerly '1' -> Set null to disable caching mechanism;
	options.mustMatch = options.mustMatch || 0;
	options.extraParams = options.extraParams || {};
	options.loadingClass = options.loadingClass || "ac_loading";
	options.selectFirst = options.selectFirst || false;
	options.selectOnly = options.selectOnly || false;
	options.maxItemsToShow = options.maxItemsToShow || -1;
	options.autoFill = options.autoFill || false;
	options.width = parseInt(options.width, 10) || 0;
	options.noResultsClass = options.noResultsClass || "ac_none";
	options.noResultsMessage = options.noResultsMessage || "No results found";

	this.each(function() {
		var input = this;
		new jQuery.autocomplete(input, options);
	});

	// Don't break the chain
	return this;
}

jQuery.fn.autocompleteArray = function(data, options) {
	return this.autocomplete(null, options, data);
}

jQuery.fn.indexOf = function(e){
	for( var i=0; i<this.length; i++ ){
		if( this[i] == e ) return i;
	}
	return -1;
};