How to Detect/Find Page is Loaded

Hi All,
You my want to know sometimes that is the page loaded completely?
This simple javascript function can let you know:

var body = document.getElementsByTagName('BODY')[0];

if (body && body.readyState == 'loaded')
{
AfterLoad();
}
else
{
if (window.addEventListener)
{
window.addEventListener('load', AfterLoad, false);
}
else
{
window.attachEvent('onload', AfterLoad);
}
}
function AfterLoad()
{
alert("page loaded !!!");
}

Thats it...

Thanks,
Nitin Sharma