function movedown(){
  if (window.moveupvar) clearTimeout(moveupvar);
  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 (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 movetop(){
  stopscroll();
  if (iens6)
  crossobj.style.top=0+"px";
  else if (ns4)
  crossobj.top=0;
}

//  This function is also referenced in JS_tic
function getcontent_height2(){
  if (iens6)   {
        contentheight=crossobj.offsetHeight;
  }  else if (ns4) {
    document.nscontainer.document.nscontent.visibility="show";
  }

}