(function ($) {
    var hasResult = false;
    var currentSelect = "";
    var selectedCity = "";

    String.prototype.trim = function () { //自定义的trim方法 防止浏览器兼容性造成的问题 2012-10-9  Lzz
        return this.replace(/^\s+|\s+$/g, '');
    }

    $.suggest = function (input, options) {
        //var $input = $(input).attr("autocomplete", "off");
        var $input = $(input);
        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?)

        if ($.trim($input.val()) == '' || $.trim($input.val()) == '中文/英文') $input.val('').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);

        $input.blur(function () {
            /*********update at 2011-12-23 ,默认第一个**********/
           /*if ($(this).val().length == 0) {
                hasResult = false;
            }

            if (hasResult) {
                $(input).val(currentSelect).css('color', '#000');
                hasResult = false;
                currentSelect = "";
            }
            else {
                $(this).val("中文/拼音").css('color', '#aaa');
            }*/
            /****************************************************/
        	var $value = $input.val();
        	if( $value=="" ||  $value.length == 0){
        		$('input[name='+$input[0].id+']').val('');
        	}else{
        		var $val = $('input[name='+$input[0].id+']').val();
        		if(($value.length > 0 && !hasResult) || $val.length == 0){
        			$input.val('');
        		}
        	}
            setTimeout(function () { $results.hide(); }, 200);
        });

        $input.focus(function () {
            if ($.trim($(this).val()) == '中文/英文') {
                $(this).val('').css('color', '#000');
            }
            if ($.trim($(this).val()) == '') {
            	 displayItems('',options.listSize,options.parentVal); //显示热门城市列表
            }
        });
        $input.click(function () {
            var q = $.trim($(this).val());
            displayItems(q,options.listSize,options.parentVal);
            $(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,options.listSize,options.parentVal);
        }
        function displayItems(items,size,parentname) {
        	var parentVal = null;
        	if(parentname){ //用于联动
        		var pp_val = $('#'+parentname).val();
        		if(pp_val.length > 0){
        			parentVal = pp_val;
        		}else{
        			pp_val = $('input[name='+parentname+']').val();
        			if(pp_val.length > 0){
        				parentVal = pp_val;
        			}
        		}
        	}
            var html = '';
            var listsize = size||10;
            var iframe_attach = "";
            var current_broswer = navigator.userAgent.toLowerCase();
            if (current_broswer.match(/msie ([6.]+)/)) {//如果是ie6
                //231px对应10个提示选项和一个tip头（提示项和tip头都是21px）
                iframe_attach = "<iframe id ='iframe_attach' src='#' style='width: 200px;height:231px; z-index: -1; display:inherit; position: absolute;' frameborder='0'></iframe>";
            }
            if (items == '') {//热门城市遍历
                var count = 0;
                for (h in options.hot_list) {
                    if (null != options.hot_list[h][0]&& (parentVal==null || parentVal== options.hot_list[h][0] )) {
                        html += '<li rel="' + options.hot_list[h][0] + '"><a href="#' + h + '"><span>' + options.hot_list[h][1] + '</span>' + options.hot_list[h][2] + '<span><font style="display:none;">' + options.hot_list[h][3] + '</font></span></a></li>';
                        count++;
                        if (count == size) {
                            break;
                        }
                    }
                }
                html = iframe_attach + '<div class="gray ac_result_tip">请输入中文/英文或者↑↓选择</div><ul>' + html + '</ul>';
            }
            else {
                /*if (!items)
                return;
                if (!items.length) {
                $results.hide();
                return;
                }*/

                var jSum = 0;
                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][0]) || reg.test(options.source[i][1]) || reg.test(options.source[i][2]) || reg.test(options.source[i][3])) {
                    	 if(parentVal==null || parentVal == options.source[i][0] ) {
                    		 html += '<li rel="' + options.source[i][0] + '"><a href="#' + i + '"><span>' + options.source[i][1] + '</span>' + options.source[i][2] + '<span><font style="display:none;">' + options.source[i][3] + '</font></span></a></li>';
                    	 }
                    	jSum++;

                    }
                    if (jSum == listsize) {
                        break;
                    }

                }
                if (html == '') {
                    hasResult = false;
                    suggest_tip = '<div class="gray ac_result_tip">对不起，找不到：' + items + '</div>';
                }
                else {
                    hasResult = true;
                    suggest_tip = iframe_attach + '<div class="gray ac_result_tip">' + items + '，按字母排序</div>';
                }
                /***取出当前第一个城市的英文 add at 2011-12-23****/
                var pos = html.indexOf("</span>") + 7;
                //currentSelect = html.substr(pos, html.indexOf("</a>", pos + 1) - pos);
                currentSelect = html.substr(pos, html.indexOf("<span>", pos) - pos);
                /*************************************************/
                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) {
                $(options.selectCity).val($currentResult.children('a').children("span").eq(1).children('font').html());
                $input.val($currentResult.children('a').html().replace(/<span>.+?<\/span>|<SPAN>.+?<\/SPAN>/g, '')).css('color', '#000');
                /**绑定ID**/
                $('input[name='+$input[0].id+']').val($currentResult.children('a').find('FONT').html());
                $('input[name='+$input[0].id+']').change();
                /***/
                $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);

        }

    }

    $.fn.suggest = function (source, options) {
        if (!source)
            return;
        options = options || {};
        options.source = source;
        options.parentVal = options.parentVal || null;
        options.listSize = options.listSize || 10;
        options.hot_list = 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;
        options.selectCity = options.selectCity || ""; //控件的id，存在选择的city
        //options.tips = options.tips || "中文/拼音";

        this.each(function () {
            new $.suggest(this, options);
        });

        return this;

    };

})(jQuery);