购物车修改

@@ -18,6 +18,7 @@ var $chosePanel = $('#chose-panel'),
     $chosed,
     $imgsThumb,
     $leftNum,
+    $leftNumHtml,
     leftNum,
     confirming,
     curColorIndex,
@@ -41,6 +42,7 @@ function init() {
     $allChoseItems = $('.chose-items');
     $sizeRowList = $('.size-list ul');
     $leftNum = $('#left-num');
+    $leftNumHtml =
     $sizeRowList.eq(0).toggleClass('hide');
 }
 
@@ -297,7 +299,7 @@ $yohoPage.on('touchstart', '.btn-minus', function() {
         promotionId,
         isEdit = 0,
         numInCart = $('.num-tag').html() - 0,
-        num = $num.val();
+        num = parseInt($num.val(), 10);
 
     //颜色尺码没有选择
     if (!checkColorSizeNum()) {
@@ -309,7 +311,7 @@ $yohoPage.on('touchstart', '.btn-minus', function() {
         return;
     }
 
-    leftNum = $('#left-num').val();
+    leftNum = $('#left-num').val() - 0;
 
     if (num > leftNum) {
         tip.show('您选择的数量超过了最大库存量~');