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 <title>JS全屏漂浮广告-柯乐义</title>

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 div#roll{width:100px;height:100px; background-color:#000; color:#fff; position:absolute;}

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 <div><h2>JS全屏漂浮广告，移入光标停止移动·柯乐义</h2><a href="http://keleyi.com/a/bjac/ara6jk5h.htm" target="_blank">原文</a></div>

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 <div id="roll">我是广告<br />keleyi.com</div>

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 roll: document.getElementById("roll"),

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 statusX: 1,

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 x: 100,

 y: 300,

 winW: document.documentElement.clientWidth - document.getElementById("roll").offsetWidth,

 winH: document.documentElement.clientHeight - document.getElementById("roll").offsetHeight,

 Go: function () {

 this.roll.style.left = this.x + 'px';

 this.roll.style.top = this.y + 'px';

 this.x = this.x + (this.statusX ? -1 : 1)

 if (this.x < 0) { this.statusX = 0 }

 if (this.x > this.winW) { this.statusX = 1 }

 this.y = this.y + (this.statusY ? -1 : 1)

 if (this.y < 0) { this.statusY = 0 }

 if (this.y > this.winH) { this.statusY = 1 }

 }

 }

 var interval = setInterval("ggRoll.Go()", ggRoll.speed);

 ggRoll.roll.onmouseover = function () { clearInterval(interval) };

 ggRoll.roll.onmouseout = function () { interval = setInterval("ggRoll.Go()", ggRoll.speed) };

 </script>

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