<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="http://www.coding123.net/js/jquery.js"></script>
<script type="text/javascript">
$(function () {
var ie6 = /msie 6/i.test(navigator.userAgent)
, dv = $('#fixedMenu'), st;
dv.attr('otop', dv.offset().top); //存储原来的距离顶部的距离
$(window).scroll(function () {
st = Math.max(document.body.scrollTop || document.documentElement.scrollTop);
if (st >= parseInt(dv.attr('otop')))
{
if (ie6)
{//IE6不支持fixed属性，所以只能靠设置position为absolute和top实现此效果
dv.css({ position: 'absolute', top: st });
}
else if (dv.css('position') != 'fixed')
{ dv.css({ 'position': 'fixed', top: 0 });
}
}
else if (dv.css('position') != 'static')
{ dv.css({ 'position': 'static' });
}
});
});
</script>
</head>
<body>
<div style="height:500px;background:#999"></div>
<div id="fixedMenu" style="background:#eee;width:100%;">MENU</div>
<div style="height:900px;background:#999">
<p>123</p>
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</div>
</body>
</html>
