fix size selection bug

@@ -57,6 +57,7 @@ function setActive($item) {
 
     var $colorList = $item.find('.color-list');
     var $sizeList = $item.find('.size-list');
+    var activeIndex = 0;
 
     $colorList.find('.img-box').each(function(i, box) {
         var $box = $(box);
@@ -64,10 +65,14 @@ function setActive($item) {
         if ($box.find('img').data('color') === color) {
             $colorList.find('.img-box').eq(i).addClass('active');
 
+            activeIndex = i;
+
             return false;
         }
     });
 
+    $sizeList = $sizeList.eq(activeIndex).removeClass('hide');
+
     $sizeList.find('span').each(function(i, s) {
         var $size = $(s);
 

 <div>
     {{#goodsList}}
-        <div class="{{#unless @first}}hide{{/unless}} size-list" data-index="{{@index}}">
+        <div class="hide size-list" data-index="{{@index}}">
         {{#sizeList}}
             <span data-size="{{sizeName}}" data-sku="{{productSku}}" data-id="{{goodsId}}" {{#unless storageNumber}}class="disable"{{/unless}}>{{sizeName}}</span>
         {{/sizeList}}