网页加载中 代码

<script language="JavaScript" type="text/javascript">
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>79) pos += dir;
    if (pos>79) len -= dir;
    if (pos>79 && 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';
}
</script>
<style>
#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:130px;
    border:1px solid #5a667b;
    text-align:left;
    z-index:2;
}
#progress {
    height:5px;
    font-size:1px;
    width:1px;
    position:relative;
    top:1px;
    left:0px;
    background-color:#8894a8;
}
#loader_bg {
    background-color:#e4e7eb;
    position:relative;
    top:8px;
    left:8px;
    height:7px;
    width:113px;
    font-size:1px;
}
</style>
<body >
<div id="loader_container">
    <div id="loader">
    <div align="center">页面正在加载中 …</div>
    <div id="loader_bg"><div id="progress"> </div></div>
    </div>
</div>
</body>

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