jQuery.autocomplete = function(input, options) {
	var me = this;
	var $input = $(input).attr("autocomplete", "off");
	if (options.inputClass)
		$input.addClass(options.inputClass);
	var results = document.createElement("div");
	var $results = $(results);
	$results.hide().addClass(options.resultsClass).css("position", "absolute");
	if (options.width > 0)
		$results.css("width", options.width);
	$("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;
	function flushCache() {
		cache = {};
		cache.data = {};
		cache.length = 0;
	}
	;
	flushCache();
	if (options.data != null) {
		var sFirstChar = "", stMatchSets = {}, row = [];
		if (typeof options.url != "string")
			options.cacheLength = 1;
		for ( var i = 0; i < options.data.length; i++) {
			row = ((typeof options.data[i] == "string") ? [ options.data[i] ]
					: options.data[i]);
			if (row[0].length > 0) {
				sFirstChar = row[0].substring(0, 1).toLowerCase();
				if (!stMatchSets[sFirstChar])
					stMatchSets[sFirstChar] = [];
				stMatchSets[sFirstChar].push(row);
			}
		}
		for ( var k in stMatchSets) {
			options.cacheLength++;
			addToCache(k, stMatchSets[k]);
		}
	}
	$input.keydown(function(e) {
		lastKeyPressCode = e.keyCode;
		switch (e.keyCode) {
		case 38:
			e.preventDefault();
			moveSelect(-1);
			break;
		case 40:
			e.preventDefault();
			moveSelect(1);
			break;
		case 9:
		case 13:
			if (selectCurrent()) {
				$input.get(0).blur();
				e.preventDefault();
			}
			break;
		default:
			active = -1;
			if (timeout)
				clearTimeout(timeout);
			timeout = setTimeout(function() {
				onChange();
			}, options.delay);
			break;
		}
	}).focus(function() {
		hasFocus = true;
	}).blur(function() {
		hasFocus = false;
		hideResults();
	});
	hideResultsNow();
	function onChange() {
		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) {
			$input.addClass(options.loadingClass);
			requestData(v);
		} else {
			$input.removeClass(options.loadingClass);
			$results.hide();
		}
	}
	;
	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");
	}
	;
	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 true;
		} else {
			return false;
		}
	}
	;
	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);
	}
	;
	function createSelection(start, end) {
		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();
	}
	;
	function autoFill(sValue) {
		if (lastKeyPressCode != 8) {
			$input.val($input.val() + sValue.substring(prev.length));
			createSelection(prev.length, sValue.length);
		}
	}
	;
	function showResults() {
		var pos = findPos(input);
		var iWidth = (options.width > 0) ? options.width : $input.width();
		$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) {
			$input.removeClass(options.loadingClass);
			results.innerHTML = "";
			if (!hasFocus || data.length == 0)
				return hideResultsNow();
			if ($.browser.msie) {
				$results.append(document.createElement('iframe'));
			}
			results.appendChild(dataToDom(data));
			if (options.autoFill && ($input.val().toLowerCase() == q.toLowerCase()))
				autoFill(data[0][0]);
			showResults();
		} else {
			hideResultsNow();
		}
	}
	;
	function parseData(data) {
		if (!data)
			return null;
		var parsed = [];
		var rows = data.split(options.lineSeparator);
		for ( var i = 0; i < rows.length; i++) {
			var row = $.trim(rows[i]);
			if (row) {
				parsed[parsed.length] = row.split(options.cellSeparator);
			}
		}
		return parsed;
	}
	;
	function dataToDom(data) {
		var ul = document.createElement("ul");
		var num = data.length;
		if ((options.maxItemsToShow > 0) && (options.maxItemsToShow < num))
			num = options.maxItemsToShow;
		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;
	}
	;
	function requestData(q) {
		if (!options.matchCase)
			q = q.toLowerCase();
		var data = options.cacheLength ? loadFromCache(q) : null;
		if (data) {
			receiveData(q, data);
		} else if ((typeof options.url == "string") && (options.url.length > 0)) {
			$.get(makeUrl(q), function(data) {
				data = parseData(data);
				addToCache(q, data);
				receiveData(q, data);
			});
		} else {
			$input.removeClass(options.loadingClass);
		}
	}
	;
	function makeUrl(q) {
		var url = options.url + "?q=" + 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 (matchSubset(x0, q)) {
							csub[csub.length] = x;
						}
					}
					return csub;
				}
			}
		}
		return null;
	}
	;
	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;
	}
	;
	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)) {
			$.get(makeUrl(q), function(data) {
				data = parseData(data)
				addToCache(q, data);
				findValueCallback(q, data);
			});
		} else {
			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];
			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) {
	options = options || {};
	options.url = url;
	options.data = ((typeof data == "object") && (data.constructor == Array)) ? data
			: null;
	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 || 1;
	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;
	this.each(function() {
		var input = this;
		new jQuery.autocomplete(input, options);
	});
	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;
};