1. Design source code Copy code The code is as follows: Form submission form page does not jump <br></body> <br></html> <br> </div> <br>2. Running results <br><br> (1) Enter "451", single Click "Submit" <br><br><img src="http://files.jb51.net/file_images/article/201402/201402201529472.gif?2014120153050" alt=""> <br><br> (2) Enter "45464646" and click "Submit" <br><br><img src="http://files.jb51.net/file_images/article/201402/201402201530103.gif?2014120153114" alt=""> <br><br>Page submission refresh , no jump
