贴吧发帖防止多次提交表单

app/views/forums/show.html.erb

@@ -109,11 +109,13 @@
         <% end %>
     });
 
+    var first_click = true;
     function check_and_submit(){
         if(!check_memo_name()){
             return;
         }
-        if($("textarea[name='memo[subject]']").val().trim() != "" && !memo_content.isEmpty() ){
+        if($("textarea[name='memo[subject]']").val().trim() != "" && !memo_content.isEmpty() && first_click){
+            first_click = false;
             memo_content.sync();
             $.ajax({
                 url:'/forums/'+'<%= @forum.id.to_s%>'+'/memos',