.loading{
	background-color: #404040; 
	background-image: url("../img/loading_ajax.gif"); 
	background-repeat: no-repeat; 
	background-position: 6px 6px; 
	-webkit-border-radius:8px; 
	-moz-border-radius:8px; 
	border-radius: 8px; 
	border: solid 1px #ffffff; 
	color: #FFFFFF; 
	font-size: 12px; 
	font-weight: bold; 
	left: 50%; 
	top: 50%; 
	margin-left: -61px; 
	opacity: 0.9; 
	position: fixed; 
	z-index: 9999; 
	width: 45px; 
	height: 45px;
}

.cortina {
	position:fixed;
	top:0; right:0; bottom:0; left:0;
	margin:0; padding:0;
	background: #000;
	opacity:.75;
	filter: alpha(opacity=75);
	-moz-opacity: 0.75;
	z-index: 1;
}