window.onload=function(){showBox();setTimeout("closeBox()",30000)} 
function showBox(o){ 
if (o==undefined) o=document.getElementById("rbbox"); 
o.style.height=o.clientHeight+2+"px"; 
if (o.clientHeight<80) setTimeout(function(){showBox(o)},5); 
} 
function closeBox(){document.getElementById("rbbox").style.display="none";}