Add email validation regex setting!

modules/ask/_ask_widget_form.html.erb

@@ -74,5 +74,29 @@
         }
       }
     })
+    $(document).ready(function(){
+      var email_regex = "{{email_regex}}";
+      if(email_regex.length != 0){
+        email_regex = new RegExp(email_regex);
+        var submit_flag = false;
+        $(".ask-question-form").each(function(i, form){
+          var $form = $(form);
+          if($form.length != 0 && $form.find('#ask_question_mail').length != 0){
+            $form.submit(function(){
+              if(!submit_flag){
+                submit_flag = true;
+                if(email_regex.test($form.find('#ask_question_mail').val())){
+                  submit_flag = false;
+                }else{
+                  alert("<%=t('ask.please_check_email_format')%>");
+                  submit_flag = false;
+                  return false;
+                }
+              }
+            })
+          }
+        })
+      }
+    })
   </script>
 </div>