diff --git a/public/javascripts/init_activity_KindEditor.js b/public/javascripts/init_activity_KindEditor.js
index decbbb341..ac914ca19 100644
--- a/public/javascripts/init_activity_KindEditor.js
+++ b/public/javascripts/init_activity_KindEditor.js
@@ -26,7 +26,7 @@ function init_editor(params){
             if(/^\s*<\w*\s*\w*\=\"\w*\"\s*\w*\=\"\w*\:\s*\#\d*\;\s*\w*\-\w*\:\s*\w*\;\"\>[\u4e00-\u9fa5]*<\/\w*\>\s*$/.test(this.edit.html())){
                 params.submit_btn.hide();
                 this.resize("95%", null);
-            }else if(edit.html().val().trim() != ""){
+            }else if(this.edit.html().trim() != ""){
                 params.submit_btn.show();
             }