var t_id = setInterval(animate,50);
var pos=0;
var dir=2;
var len=0;
function animate()
{
   var elem = document.getElementById('progress');
   if(elem != null)
   {
      if (pos==0) len += dir;
      if (len>32 || pos>79) pos += dir;
      if (pos>79) len -= dir;
      if (pos>79 && len==0) pos=0;
      elem.style.left = pos;
      elem.style.width = len;
   }
}
function remove_loading()
{
   this.clearInterval(t_id);
   var targelem = document.getElementById('loader_container');
   targelem.style.display='none';
   targelem.style.visibility='hidden';
}