window.onload=maxWindow;

function maxWindow(){
window.moveTo(0,0);

if(document.all){
top.window.resizeTo(screen.availWidth, screen.availHeight);
}
else if(document.layers||document.getElementById){
if (top.window.outerHeight <screen.availHeight ||
top.window.outerWidth <screen.availwidth)
{
top.window.outerHeight=screen.availHeight;
top.window.outerWidth=screen.availWidth}
}
}