完善 jit 拆单地址修改

@@ -116,7 +116,13 @@ $invoice.on('touchend', '.checkbox', function() {
 
 function updateDeliverId(id) {
     var $moreJit = $('.more-jit a').get(0),
+        url;
+
+    if ($moreJit) {
         url = $moreJit.href;
+    } else {
+        return;
+    }
 
     if (url.indexOf('deliveryId') < 0) {
         $moreJit.href = url + '&deliveryId=' + id;