页面加载进度

<style type="text/css">
#loader_container {
text-align:center;
position:absolute;
top:40%;
width:100%;
left: 0;
}

#loader {
font-family:Tahoma, Helvetica, sans;
font-size:11.5px;
color:#000000;
background-color:#FFFFFF;
padding:10px 0 16px 0;
margin:0 auto;
display:block;
width:230px;
border:1px solid #5a667b;
text-align:left;
z-index:2;
}
#loader_bg {background-color:#e4e7eb;
position:relative;
top:8px;
left:8px;
height:7px;
width:213px;
font-size:1px}
#progress {
height:5px;
font-size:1px;
width:1px;
position:relative;
top:1px;
left:0px;
background-color:#77A9E0
}
</style>
<script language="JavaScript">
//读取框
var t_id = setInterval(animate,20);
var pos=0;
var dir=2;
var len=0;

function animate()
{
var elem = document.getElementById('progress');
if(elem != null) {
if (pos==0) len += dir;
if (len>32 || pos>179) pos += dir;
if (pos>179) len -= dir;
if (pos>179 && len==0) pos=0;
elem.style.left = pos;
elem.style.width = len;
}
}
function remove_loading() {
this.clearInterval(t_id);
var targelem = document.getElementById('loader_container');
targelem.style.display='none';
targelem.style.visibility='hidden';
initJS();
}
</script>

</head>

<script type="text/javascript">
    window.onload = function() {
    remove_loading();
    }
</script>