漂浮div的问题

2009-12-30 10:58:33 155 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

JavaScript随机漂浮碰壁效果实现了元素随机漂浮，在边缘会有触碰效果。代码比较常见于漂浮广告，当然这种广告是不推荐使用的，让人感觉厌烦。代码实例如下: <!doctype html> <html> <head> <meta charset="utf-8"> <meta name="author" content="http://www.softwhy.com/" /&g... 阅读详情

这段代码有问题么？
明明在普通html页面运行很好的代码，但是到了一个css+div的jsp页面。
浮动div也不跟随滚动栏了，并且向右向下漂浮时出界。



<html>

<head>

<title>js test</title>

</head>

<body>

<DIV id=img1 name=img1 style="Z-INDEX: 100; LEFT: 2px; WIDTH: 59px; POSITION: absolute; TOP: 43px; HEIGHT: 61px; visibility: visible;"><embed src="http://img1.126.net/channel5/006557/yd200120_091117.swf" width="210" height="84" wmode="transparent"></embed><a href="#" onClick="noshow(1)">x</a>

</DIV>

<script language="javascript" type="text/javascript">

var xPos = 300;

var yPos = 200; 

var step = 1;

var delay = 30; 

var height = 0;

var Hoffset = 0;

var Woffset = 0;

var yon = 0;

var xon = 0;

var pause = true;

var interval;

img1.style.top = yPos;

function changePos() 

{

	width =  document.body.clientWidth;

	height = document.body.clientHeight;

	Hoffset = img1.offsetHeight;

	Woffset = img1.offsetWidth;

	img1.style.left = xPos +  document.body.scrollLeft;

	img1.style.top = yPos +  document.body.scrollTop;

	if (yon) 

		{yPos = yPos + step;}

	else 

		{yPos = yPos - step;}

	if (yPos < 0) 

		{yon = 1;yPos = 0;}

	if (yPos >= (height - Hoffset)) 

		{yon = 0;yPos = (height - Hoffset);}

	if (xon) 

		{xPos = xPos + step;}

	else 

		{xPos = xPos - step;}

	if (xPos < 0) 

		{xon = 1;xPos = 0;}

	if (xPos >= (width - Woffset)) 

		{xon = 0;xPos = (width - Woffset);   }

	}

	

	function start()

	 {

	 	img1.visibility = "visible";

		interval = setInterval('changePos()', delay);

	}

	function pause_resume() 

	{

		if(pause) 

		{

			clearInterval(interval);

			pause = false;}

		else 

		{

			interval = setInterval('changePos()',delay);

			pause = true; 

			}

		}

	start();

function noshow(n){

document.getElementById('img'+n).style.display="none";

}

</script>



<!--<SCRIPT src="js/zyz.js"></SCRIPT>!-->

 <table width="778" height="1500" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="f4f4f4">

  <tr>

    <td>  </td>

  </tr>

</table></body>

</html>