Window.onbeforeunload - know what the user clicked

JavaScript
5

What happens if you use setTimeout() to call a function one second after that event? If the user clicked ok, the page would unload before the time was up, right?

window.onbeforeunload = function()
{
    var bUnsavedFields = FormUtil.checkModifiedFields("formToCheck");

    if(bUnsavedFields)
    {
        window.event.returnValue = "You have unsaved work";
    }
    [b]setTimeout("myFunctionA();",1000);[/b]
}