(function($){
	$.fn.suggest = function(source, options) {
		source=eval(source);
		if (!source)
			return;
		options = options || {};
		options.source =source ;
		options.hot_list=eval(options.hot_list) || [];
		options.delay = options.delay || 0;
		options.resultsClass = options.resultsClass || 'ac_results';
		options.selectClass = options.selectClass || 'ac_over';
		options.matchClass = options.matchClass || 'ac_match';
		options.minchars = options.minchars || 1;
		options.delimiter = options.delimiter || '\n';
		options.onSelect = options.onSelect || false;
		options.dataDelimiter = options.dataDelimiter || '\t';
		options.dataContainer = options.dataContainer || '#SuggestResult';
		options.attachObject = options.attachObject || null;
		this.each(function() {
			new $.suggest(this, options);
		});
		return this;
	};	
	$.suggest = function(input, options) {
		var $input = $(input).attr("autocomplete", "off");
		var $results;
		var timeout = false;		// hold timeout ID for suggestion results to appear	
		var prevLength = 0;			// last recorded length of $input.val()
		var cache = [];				// cache MRU list
		var cacheSize = 0;			// size of cache in chars (bytes?)
		var checked=0;               //是否是下拉框里的值	
		if($.trim($input.val())=='' || $.trim($input.val())=='中文/拼音') $input.val('中文/拼音').css('color','#aaa');
		if( ! options.attachObject )
			options.attachObject = $(document.createElement("ul")).appendTo('body');
		$results = $(options.attachObject);
		$results.addClass(options.resultsClass);
		resetPosition();
		$(window)
			.load(resetPosition)		// just in case user is changing size of page while loading
			.resize(resetPosition);
		$input.blur(function() {
			setTimeout(function() { $results.hide() }, 200);
			if(checked==0){
				if(! options.defaultPort)
					$input.val('中文/拼音').css('color','#aaa');
				else
					$input.val(options.defaultPort);
			}else{
				selectCurrentResult();
			}
		});
		$input.focus(function(){
			if($.trim($(this).val())=='中文/拼音'){
				$(this).val('').css('color','#000');
			}
			if($.trim($(this).val())==''){
				displayItems('');//显示热门城市列表
			}
		});
		$input.click(function(){
			var q=$.trim($(this).val());
			displayItems(q);
			$(this).select();
		});			
		// help IE users if possible
		/*try {
			$results.bgiframe();
		} catch(e) { }
		*/
		$input.keyup(processKey);//
		function resetPosition() {
			// requires jquery.dimension plugin
			var offset = $input.offset();
			$results.css({
				top: (offset.top + input.offsetHeight) + 'px',
				left: offset.left + 'px'
			});
		}
		function processKey(e) {	
			// handling up/down/escape requires results to be visible
			// handling enter/tab requires that AND a result to be selected
			if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) ||
				(/^13$|^9$/.test(e.keyCode) && getCurrentResult())) {
				if (e.preventDefault)
					e.preventDefault();
				if (e.stopPropagation)
					e.stopPropagation();
				e.cancelBubble = true;
				e.returnValue = false;
				switch(e.keyCode) {
					case 38: // up
						prevResult();
						break;
					case 40: // down
						nextResult();
						break;
					case 13: // return
						selectCurrentResult();
						break;	
					case 27: //	escape
						$results.hide();
						break;
				}	
			} else if ($input.val().length != prevLength) {
				if (timeout) 
					clearTimeout(timeout);
				timeout = setTimeout(suggest, options.delay);
				prevLength = $input.val().length;	
			}				
		}
		function suggest() {
			var q = $.trim($input.val());
			displayItems(q);
		}		
		function displayItems(items) {
			var html = '';
			if (items=='') {//热门城市遍历
				for(h in options.hot_list){
					html+='<li rel="'+options.hot_list[h][0]+'"><a href="#'+h+'"><span class="jianma">'+options.hot_list[h][2]+'</span>'+options.hot_list[h][1]+'<span class="quanpin">('+options.hot_list[h][3]+')</span>'+'</a></li>';
				}
				html='<div class="gray ac_result_tip">请输入中文/拼音或↑↓选择</div><ul>'+html+'</ul>';
			}
			else {
				/*if (!items)
				return;
				if (!items.length) {
					$results.hide();
					return;
				}*/
				for (var i = 0; i < options.source.length; i++) {//国内城市匹配
					var reg = new RegExp('^' + items + '.*$', 'im');
					if (reg.test(options.source[i][2]) || reg.test(options.source[i][3]) || reg.test(options.source[i][1])) {
						html += '<li rel="' + options.source[i][0] + '"><a href="#' + i + '"><span class="jianma">' + options.source[i][2] + '</span>' + options.source[i][1]+'<span class="quanpin">('+options.source[i][3]+')</span>' + '</a></li>';
					}
				}
				if (html == '') {
					suggest_tip = '<div class="gray ac_result_tip">对不起，找不到：' + items + '</div>';
					checked=0;
				}
				else {
					suggest_tip = '<div class="gray ac_result_tip">' + items + '，按拼音排序</div>';
					checked=1;
				}
				html = suggest_tip + '<ul>' + html + '</ul>';
			}
			$results.html(html).show();
			$results.children('ul').children('li:first-child').addClass(options.selectClass);
			$results.children('ul')
				.children('li')
				.mouseover(function() {
					$results.children('ul').children('li').removeClass(options.selectClass);
					$(this).addClass(options.selectClass);
				})
				.click(function(e) {
					e.preventDefault(); 
					e.stopPropagation();
					selectCurrentResult();
				});
		}			
		function getCurrentResult() {
			if (!$results.is(':visible'))
				return false;
			var $currentResult = $results.children('ul').children('li.' + options.selectClass);
			if (!$currentResult.length)
				$currentResult = false;	
			return $currentResult;
		}
		function selectCurrentResult() {
			$currentResult = getCurrentResult();
			if ($currentResult) {
				$input.val($currentResult.children('a').html().replace(/<span.+?>.+?<\/span>/gi,'')).css('color','');
				$results.hide();
				if( $(options.dataContainer) ) {
					$(options.dataContainer).val($currentResult.attr('rel'));
				}
				if (options.onSelect) {
					options.onSelect.apply($input[0]);
				}
			}
		
		}
		function nextResult() {
			$currentResult = getCurrentResult();
			if ($currentResult)
				$currentResult
					.removeClass(options.selectClass)
					.next()
						.addClass(options.selectClass);
			else
				$results.children('ul').children('li:first-child').addClass(options.selectClass);
		}
		function prevResult() {
			$currentResult = getCurrentResult();
			if ($currentResult)
				$currentResult
					.removeClass(options.selectClass)
					.prev()
					.addClass(options.selectClass);
			else
				$results.children('ul').children('li:last-child').addClass(options.selectClass);
		
		}
	};

})(jQuery);