Hi,

I was testing some code in IE7 with framesets and got a strange bug. If you only have one window open and do the following,

window.onunload = unloadFunc;
top.window.onunload = unloadFunc;

function unloadFunc()
{
alert('Goodbye');
}

function unloadFunc2()
{
alert('Hasta la vista');
}

then unloadFunc() gets fired twice. It seems as if the window.onunload and top.window.onunload are 2 separate events. I tried to see if window == top.window and the result is true.

window.onunload = unloadFunc;
top.window.onunload = unloadFunc2;

If I do the above, both functions get executed. I get 'Hasta la vista' followed by 'Goodbye'.

Do you have any idea why there are 2 separate events? Does it have to do with the new tabs or is it just a bug in IE7?

I have attached a sample file. You'll need to rename it to an html extension to test.

Thanks in advance