iens6=document.all||document.getElementById;
ns4=document.layers;
var speed=2;
if (iens6){
var crossobj=document.getElementById? document.getElementById("content") : document.all.content;
var contentheight=crossobj.offsetHeight;
}
var direction='down';

function movedown(){

if (iens6&&parseInt(crossobj.style.top)>=(contentheight*(-1)+300)&&direction=='down') 
  crossobj.style.top=parseInt(crossobj.style.top)-speed+'px';
else if (iens6&&parseInt(crossobj.style.top)<=(contentheight*(-1)+300)&&direction=='down'){
  window.setTimeout("direction='up';",1000);
  }
  
if (iens6&&parseInt(crossobj.style.top)<0&&direction=='up')
  crossobj.style.top=parseInt(crossobj.style.top)+speed+'px';
else if (iens6&&parseInt(crossobj.style.top)>=0&&direction=='up') {
  window.setTimeout("direction='down';",1000);
  }
  
movedownvar=setTimeout("movedown();",100);
}

function getcontent_height(){
contentheight=crossobj.offsetHeight;
}
function start_scroll() {
window.setTimeout("movedown()",1000);
}