function testingPopup(evt) {
spyWin = window.open('page2.html','testing',
'width=100,height=100,left=100,top=0,status=0');
spyWin.addEventListener("close", closedWin, false);
spyWin.onclose = closedWin;
}
function closedWin() {
confirm("close ?");
return false;
}
if(window.attachEvent) {
window.attachEvent("onunload", testingPopup);
} else {
if(window.addEventListener) {
window.addEventListener("unload", testingPopup, false);
} else {
window.onunload = testingPopup;
}
}