呵呵,没有仔细看帮助吧: To suppress the default Microsoft® Internet Explorer error message for the window event, set the returnValue property of the event object to true or simply return true in Microsoft JScript®. 应该是 event.returnValue = true; 或者 return true;
To suppress the default Microsoft® Internet Explorer error message for the window event, set the returnValue property of the event object to true or simply return true in Microsoft JScript®.
应该是
event.returnValue = true;
或者
return true;