'window.onbeforeunload....alert to restrict when refresh button click?

I have security problem that when user leave\close the window before logout, I want to show an alert message.

So that I did this:

window.onbeforeunload   = function(){  return " confirm msg";}

I get the alert, but now the problem is, if I click refresh button the default operation is to run without the alert message.

I got the answer for a keyboard but not for a mouse click. Can any one help me, with how to detect when the user clicks the refresh button?

If you have any suggestion please post...

Solution 1:^[1]

Unfortunately, there is no way you can tell if the onbeforeunload event is triggered by a refresh, close, etc.

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Solution	Source
Solution 1	xmarcos