Opacity not working on IE 8

[$php_mysql$]

hi this is my css code

 

#test a.p1:hover .large {
	border: 1px solid #3399FF;
	display: block;
	height: 332px;
	left: 275px;
	position: absolute;
	opacity: 0.80;
	top: -338px;
	width: 350px;
}

 

seems to be working fine on firefox, opera, google chrome but except for IE the opacity not working, how to fix it?

[$php_mysql$]

nevermind fixed,

 

filter: alpha(opacity= );