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<body bgcolor="#F7F7F7">
<!--图片漂浮广告代码开始-->
<div id="www_qpsh_com" style="position:absolute">
<!--链接地址--><a href="http://www.balidaoyou.cn" _fcksavedurl="/" target="_blank">
<!--图片地址--><img src="http://www.balidaoyou.cn/d/file/baoxian/2015-03-27/5831bef883693a6a03aca586578f3476.jpg" _fcksavedurl="http://www.balidaoyou.cn/d/file/baoxian/2015-03-27/5831bef883693a6a03aca586578f3476.jpg" border="0">
</a>
</div>
<script>
var x = 50,y = 60
var xin = true, yin = true
var step = 1
var delay = 10
var obj=document.getElementById("www_qpsh_com")
function floatwww_qpsh_com() {
var L=T=0
//by www.qpsh.com
var R= document.body.clientWidth-obj.offsetWidth
var B = document.body.clientHeight-obj.offsetHeight
obj.style.left = x + document.body.scrollLeft
obj.style.top = y + document.body.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("floatwww_qpsh_com()", delay)
obj.onmouseover=function(){clearInterval(itl)}
obj.onmouseout=function(){itl=setInterval("floatwww_qpsh_com()", delay)}
</script>
<!--图片漂浮广告代码结束-->
</body>
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原文地址：http://www.cnblogs.com/zhaoguangxing/p/4435808.html
