jQuery Loading

jQuery:
jQuery(window).load(function() {
jQuery("#welcome").fadeOut('fast');
});

css:
#welcome{
width:100%;
height:100%;
z-index:15;
position:fixed;
top:0;
left:0;
background:url("../images/loading3.gif") no-repeat center #ffffff;
opacity:0.8;
filter: alpha(opacity = 80);
}

html:
<div id="welcome"></div>