$.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);

	input.autocompleter = me;
	input.lastSelected = $input.val();

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

	$input.keydown(function(e) {
		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
				//if (selectCurrent()) {
					e.preventDefault();
				//}
				break;
			default:
				active = -1;
				if (timeout) clearTimeout(timeout);
				timeout = setTimeout(onChange, options.delay);
				break;
		}
	});

	hideResultsNow();

	function onChange() {
		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("over");

		$(lis[active]).addClass("over");


	};

	function selectCurrent() {
		var li = $("li.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;
		$input.val(v);
		hideResultsNow();
		if (options.onItemSelect) setTimeout(function() { options.onItemSelect(li) }, 1);
	};

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

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

 	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 requestData(q) {
		if (!options.matchCase) q = q.toLowerCase();
		var data = options.cacheLength ? loadFromCache(q) : null;
		if (data) {
			receiveData(q, data);
		} else {
			$.get(makeUrl(q), function(data) {
                                data = parseData(data);
                                var set = 0;
                                var rsSize = 20;


                                itemPopulate(data, set, rsSize, q);

                                    $("#rs_next").click( function() {
                                      return itemPopulate(data, ++set, rsSize, q);
                                    });
                                   // $("#rs_prev").click( function() {
                                   //   return itemPopulate(data, --set, rsSize, q);
                                   // });
			});
		}
	};
        function itemPopulate(rs, set, rsSize, q) {

            var num = set*rsSize;

                                 //clear existing rotator data
                                $("#links div").each( function() { this.innerHTML = '' } );

            var j = 0;
            for (var i=num; i < (num+20); i++) {
                if(rs[i]) $("#links div")[j++].innerHTML = rs[i][0];
            }
            if(rs.length == 0)
               $("#message").html("There are " + rs.length + " results for '" + q +  "'.");
            else if(rs.length/(rsSize*set) < 1)
               $("#message").html("Viewing Results " + (num+1) + " to " + rs.length + " for '" + q +  "'. " + rs.length + " results total.");
            else if((num+20) > rs.length)
               $("#message").html("Viewing Results " + (num+1) + " to " + rs.length  + " for '" + q +  "'. " + rs.length + " results total.");
            else
               $("#message").html("Viewing Results " + (num+1) + " to " + (num+20)  + " for '" + q +  "'. " + rs.length + " results total.");
            
            //(set > 0) ? $("#rs_prev").show() : $("#rs_prev").hide();

            if(set == 0) set = .01;
           ((rs.length-rsSize)/(rsSize*set) > 1) ? $("#rs_next").show() : $("#rs_next").hide();


        };
	function makeUrl(q) {
		var url = options.url + "?q=" + q;
		for (var i in options.extraParams) {
			url += "&" + i + "=" + options.extraParams[i];
		}
		return url;
	};

	function loadFromCache(q) {
		if (!q) return null;
		if (cache[q]) return cache[q];
		if (options.matchSubset) {
			for (var i = q.length - 1; i >= options.minChars; i--) {
				var qs = q.substr(0, i);
				var c = cache[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() {
		cache = {};
	};

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

	function addToCache(q, data) {
		if (!data || !q || !options.cacheLength) return;
		if (!cache.length || cache.length > options.cacheLength) {
			cache = {};
			cache.length = 1; // we know we're adding something
		} else if (!cache[q]) {
			cache.length++;
		}
		cache[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};
	}
}

$.fn.autocomplete = function(url, options) {
	// Make sure options exists
	options = options || {};
	// Set url as option
	options.url = url;
	// 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 || 2;
	options.delay = options.delay || 200;
	options.matchCase = options.matchCase || 0;
	options.matchSubset = options.matchSubset || 1;
	options.matchContains = options.matchContains || 1;
	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;

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

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