update

@@ -214,7 +214,7 @@ filter.registerCbFn(search);
 //3.筛选无active时点击展开筛选面板
 //4.筛选有active时点击隐藏筛选面板并恢复点击筛选前active项的active状态
 //5.当前active为筛选并且点击其他项时，隐藏筛选面板
-$listNav.delegate('li', 'tap', function() {
+$listNav.delegate('li', 'touchstart', function() {
     var $this = $(this),
         nav,
         navType,
@@ -308,7 +308,7 @@ $(window).scroll(function() {
     //当scroll到1/4$goodsContainer高度后继续请求下一页数据
     if ($(window).scrollTop() + winH >
         $(document).height() - 0.25 * $goodsContainer.height()) {
-        if ($pre != undefined) {
+        if ($pre !== undefined) {
             search();
         }
     }