Event capturing

help help help,

with this code i can capture events from active window…

window.onunload = Ausgabe;

function Ausgabe()
{

alert(“window closed…”);

}

but how to capture events for new created windows
for example:

mywin = window.open(“test.php”,”F1″,”top=0,left=0,width=150,height=400″);

and now i want to do this

mywin.onunload = unloadfunc;

function unloadfunc()
{

}

but it dont work??? whats the problem???

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