fix bug

@@ -161,6 +161,10 @@ $('.coupon-message-op-rel').on('click', function() {
     location.reload();
 });
 
+$('.nav-home').on('touchstart', function() {
+    $('.homebuttom').toggleClass('hide');
+});
+
 if ($('#noData').length > 0) {
     if (location.href.indexOf('?openby:yohobuy=') <= 0) {
         tip.show('网络异常!');
@@ -170,4 +174,4 @@ if ($('#noData').length > 0) {
 $mask.on('click', function() {
     $mask.hide();
     $message.hide();
-});
+});
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