var menu;
var theTop = 30;
var old = theTop;

function movemenu()
{
	if (window.innerHeight)
	{
		  pos = window.pageYOffset
	}
	else if (document.documentElement && document.documentElement.scrollTop)
	{
		pos = document.documentElement.scrollTop
	}
	else if (document.body)
	{
		  pos = document.body.scrollTop
	}
	if (pos < theTop) pos = theTop;
	else pos += 30;
	position = pos + "px";
	if (pos == old)
	{
		menu.style.position = 'absolute';
		menu.style.top = position;
	}
	old = pos;
	temp = setTimeout('movemenu()',2);
}