没有选择导入问卷的时候提示

app/views/poll/_other_poll.html.erb

@@ -19,9 +19,19 @@
 </div>
 
 <script>
-    function submit_quote()
+    function submit_quote() {
-    {
+        $('#error_show').html('');
+        var selected = false;
+       for(var i = 0; i < $("input[name='polls[]']").length;i++){
+           if($("input[name='polls[]']")[i].checked){
+               selected = true;
+           }
+       }
+        if (selected){
             $('#submit_quote').parent().submit();
             closeModal();
+        }else{
+            $('#error_show').html('您没有选择任何问卷');
+        }
     }
 </script>