function Hide_div(a){
  var e=document.getElementById(a);
  if(!e)return true;
  e.style.visibility="hidden";
  return true;
}

function getObj(objID)
{
    if (document.getElementById) {return document.getElementById(objID);}
    else if (document.all) {return document.all[objID];}
    else if (document.layers) {return document.layers[objID];}
}