function maxwindow()
{
	// plaats het window linksboven
	top.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.availWitdh)
		{
			top.window.outerHeight = screen.availHeight;
			top.window.outerWidth = screen.availWidth;
		}
	}
}