// speed of scroll
var speed = 4;

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

function movedown(){
   if(window.moveupvar)
      clearTimeout(moveupvar);
   if(iens6 && parseInt(crossobj.style.top) >= (contentheight*(-1) + 125))
      crossobj.style.top = parseInt(crossobj.style.top) - speed + "px";
   else if (ns4&&crossobj.top >= (contentheight*(-1)+125))
      crossobj.top -= speed;
   movedownvar = setTimeout("movedown()",20);
}

function moveup(){
   if(window.movedownvar)
      clearTimeout(movedownvar);
   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 stopscroll(){
   if (window.moveupvar) 
      clearTimeout(moveupvar);
   if (window.movedownvar)
      clearTimeout(movedownvar);
}

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

window.onload = getcontent_height;