JavaScript Reference/Event Handlers Reference/onBeforeUnload

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"onBeforeUnload" Example

   <source lang="javascript">
   

<head> <script language="JavaScript">

   function function1() { 
       self.close() 
   }
   function function2() {
       window.open("http://www.wbex.ru/", "", "width=300, height=200, left=200, noresize, top=200")
   } 

</script> </head> <body onbeforeunload="function2()">

   <input type="button" value="Unload the document" onclick="function1()">

</body> </html>


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"onBeforeUnload" is applied to

   <source lang="javascript">

+----------------+--------------------------------------------------------------+ | Applied_To |<body> <frameset> | | |window | +----------------+--------------------------------------------------------------+

     </source>
   
  


"onBeforeUnload" Properties

   <source lang="javascript">

+----------------+--------------------------------------------------------------+ | Properties |altKey altLeft | | |clientX clientY | | |ctrlKey ctrlLeft | | |returnValue shiftKey | | |shiftLeft type | +----------------+--------------------------------------------------------------+

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"onBeforeUnload" Syntax and Note

   <source lang="javascript">

Note:

This event fires before the document is unloaded. The document is unloaded when the user

    1)navigates to a different URL   or 
    2)attempts to close the browser window.
   


     </source>