<!DOCTYPE HTML>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<meta charset="gbk" />
<title>到处乱飘的广告</title>
<meta name="keywords" content="" />
<meta name="description" content="" />
<script src="http://apps.bdimg.com/libs/jquery/1.8.0/jquery.min.js"></script>
</head>
<body>
<div id="piaofu" style="position:absolute; z-index:9999; border:0px solid #ccc;">
<div style="text-align:right;">
<a href="javascript:void(0)" onclick="javascript:closePiaofu()" style="background-color: #A00;color:#fff; padding:0px 5px; text-decoration:none; font-size:12px;">[关闭]</a>
</div>
<a href="http://www.web100.cc" target="_blank" style="">
<img src="http://www.web100.cc/webui/images/logo.png" border="0" width="315" height="81" />
</a>
</div>
<script>
function closePiaofu(){
document.getElementById("piaofu").style.display = "none";
}
var x = 50,y = 160;
var xin = true, yin = true;
var step = 0.8;
var delay = 10;
var obj=document.getElementById("piaofu");
function piaofu(){
var L=T=0;
var R = $(document).width()-obj.offsetWidth;
var B = $(window).height()-obj.offsetHeight;
$("#piaofu").css('left', function(){return x + $(document).scrollLeft();});
$("#piaofu").css('top', function(){return y + $(document).scrollTop();});
x = x + step*(xin?1:-1)
if (x < L){ xin = true; x = L;}
if (x > R){ xin = false; x = R;}
y = y + step*(yin?1:-1);
if (y < T) { yin = true; y = T; }
if (y > B) { yin = false; y = B; }
}
var itl = setInterval("piaofu()", delay);
obj.onmouseover=function(){clearInterval(itl)}
obj.onmouseout=function(){itl=setInterval("piaofu()", delay)}
</script>
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</body>
注意：<!DOCTYPE HTML>，代码了html5的文档类型。很多飘浮都只能在html4的文档类型下运行，很郁闷。我使用jQuery来重写了一个飘浮代码。供大家参考。