fix change catagory

app/views/asks/index.html.erb

@@ -164,9 +164,9 @@ $(document).ready(function(){
     var submit_flag = false;
     $(".ask-question-form").each(function(i, form){
       var $form = $(form);
-      var email_field = $form.find('#ask_question_mail');
-      if($form.length != 0 && email_field.length != 0){
+      if($form.length != 0 && $form.find('#ask_question_mail').length != 0){
         $form.submit(function(){
+        var email_field = $(this).find('#ask_question_mail');
           if(!submit_flag){
             submit_flag = true;
             if(email_regex.test(email_field.val())){
@@ -188,4 +188,4 @@ $(document).ready(function(){
   }
 })
 </script>
-<% end %>
+<% end %>