function movedown(){
//if (iens6&&parseInt(crossobj.style.top)>=(contentheight*(-1)+100))
//alert("test")
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"
crossobj.top+=speed
moveupvar=setTimeout("moveup()",20)
}

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