fixed bugs in goods detail page

@@ -12,6 +12,7 @@ var likeHammer = new Hammer(document.getElementById('likeBtn'));
 likeHammer.on('tap', function(e) {
     var productId = $('#productId').val(),
         opt;
+
     var $this = $(this);
 
     if ($this.hasClass('liked')) {

@@ -102,6 +102,7 @@ a {
     color: #fff;
     font-size: 18px;
     border: none;
+    z-index:2;
     @include border-radius(10px);
 }