iens6 = document.all || document.getElementById
ns4 = document.layers

//specify speed of scroll (greater=faster)
var speed	= 1

function movedown()
{
	if (iens6&&parseInt(crossobj.style.top)>=(contentheight*(-1)+100))
		crossobj.style.top=parseInt(crossobj.style.top)-speed+"px"
	else if (ns4&&crossobj.top>=(contentheight*(-1)+100))
		crossobj.top-=speed

	movedownvar=setTimeout("movedown()",20)
}

function moveup()
{
	if (iens6&&parseInt(crossobj.style.top)<=0)
		crossobj.style.top=parseInt(crossobj.style.top)+speed+"px"
	else if (ns4&&crossobj.top<=0)
		crossobj.top+=speed

	moveupvar=setTimeout("moveup()",20)
}

function getcontent_height()
{
	if (iens6)
		contentheight=crossobj.offsetHeight
	else if (ns4)
		document.nscontainer.document.nscontent.visibility="show"
}