Untitled

<html>
<head>
<script> 
var ti = null;

function stopclock() {
  if (ti) clearInterval(ti);
  ti = null;
}
function opaT(k,i,e) {
  stopclock();
  var el=document.getElementById(k);
  if(el.style.opacity=='' || el.style.opacity!=0.1) el.style.opacity=0.1;
  if(el.style.filter=='' || el.style.filter!='alpha(opacity:10)') el.style.filter='alpha(opacity:10)';
  ti=setInterval(function(){opaI(el,i)}, e);
}
function opaI(e,t) {
	if(document.all){
		var alpha=parseInt(e.style.filter.match(/\:(\d*)\)/)[1])+10*t;
		if(alpha<100){
			e.style.filter='alpha(opacity:'+alpha+')';
		}else
			clearInterval(ti);
	}else{
		if(parseFloat(e.style.opacity)<1) e.style.opacity=parseFloat(e.style.opacity)+parseFloat(t)/10;
		else clearInterval(ti);
	}
}
 </script>
</head>
<body onload="javascript:opaT('opa',0.1,10);">
   <div id="opa" style="background:#000;width:100px;height:200px;color:#35d251;">
	123
 </div>
</body>
</html>