Show JavaScript Message While Closing IE Without Saving

Hello Friends

Following is the script to show message while navigating away from the current screen in browser.

var blnConfirmNavigation=true;
window.onbeforeunload = function (evt)
{

blnDeleteForum=false;
if(blnConfirmNavigation)
{
var message = 'You have not save the content of the page. Your changes will not be saved.';
if (typeof evt == 'undefined')
{
evt = window.event;
}
if (evt)
{
evt.returnValue = message;
}
blnDeleteForum=true;
return message;
}
}

Enjoy!