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Html: How to catch browser close

This is one of the common questions in web development. How can we catch the event when user presses X in the top-right corner of the browser window and do some staff. Pay attention to the difference between this and the body "onUnload" event, which happens on each postback. The following example shows the way how to catch X - when user closes browser.


< html >
< title >< /title >
< head >
< script language="Javascript" >
var f = 0;
function myfun(n)
{
   alert(n);
   if(n == 0)
   {  
      opener.document.getElementById("b").value = "aaaa";
      opener.document.forms(0).submit();
   }
}
< /script >
< /head >
< body onunload = "myfun(0);">
< form name = "x" >
< input type="text" name="f" value="" >
< input type="button" value="1" onClick="myfun(1);" >
< input type="button" value="2" onClick="myfun(2);" >
< input type="button" value="3" onClick="myfun(3);" >
< /form >
< /body >
< /html >

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Wednesday, September 15, 2004 3:19 AM

Comments

# re: Html: How to catch browser close
We tried this in IE6 and it doesn't work!

Eg, when the browser closes, we get no javascript alert. Does it work on your end??

9/22/2004 5:16 AM by Jarrod M Dixon

# re: Html: How to catch browser close
If we change the code to

<body onBeforeUnload="myfun(0);">

Then it works.. the onunload does not work in IE6.

p.s. Jarrod sucks

9/22/2004 5:19 AM by Jeff Atwood

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