iens6=document.all||document.getElementById;
ns4=document.layers
//specify speed of scroll (greater=faster)
var speed=5;

if (iens6){
  var crossobj=document.getElementById? document.getElementById("content") : document.all.content;
  var contentheight=crossobj.offsetHeight;
}
else if (ns4){
  var crossobj=document.nscontainer.document.nscontent;
  var contentheight=crossobj.clip.height;
}
function resetscroll(){
if (iens6&&parseInt(crossobj.style.top)<=0)
crossobj.style.top=0+"px";
else if (ns4&&crossobj.top<=0)
crossobj.top=0;
}
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";
}
window.onload=getcontent_height;