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千幕之夜 2015-11-04 09:35:11

html网页首行添加了<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 图片就不动了，但是还不能去掉这句话。

代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />

<meta name="Copyright" content="阿里西西WEB开发 http://www.alixixi.com/" />

<meta name="description" content="阿里西西WEB开发！" />

<meta content="阿里西西WEB开发" name="keywords" />

<title>阿里西西WEB开发</title>





<script language="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;<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

	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();

</script>



</head>



<body>

<DIV id=img1 style="Z-INDEX: 100; LEFT: 2px; WIDTH: 59px; POSITION: absolute; TOP: 43px; HEIGHT: 61px;

 visibility: visible;"><a href="http://www.alixixi.com/" target="_blank"><img src="images/pic1.gif" width="80" height="80" border="0"></a></DIV>

<SCRIPT src="js/js.js"></SCRIPT>

<br><br>欢迎访问：<a href="http://www.alixixi.com/" target="_blank">阿里西西WEB开发</a>







</body>

</html>

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<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <meta name="Copyright" content="阿里西西WEB开发 http://www.alixixi.com/" />
    <meta name="description" content="阿里西西WEB开发！" />
    <meta content="阿里西西WEB开发" name="keywords" />
    <title>阿里西西WEB开发</title>



</head>

<body>
    <div id=img1 style="Z-INDEX: 100; LEFT: 2px; WIDTH: 59px; POSITION: absolute; TOP: 43px; HEIGHT: 61px;
 visibility: visible;"><a href="http://www.alixixi.com/" target="_blank"><img src="images/pic1.gif" width="80" height="80" border="0"></a></div>
    <script src="js/js.js"></script>
    <br><br>欢迎访问：<a href="http://www.alixixi.com/" target="_blank">阿里西西WEB开发</a>

    <script language="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;
        var img1 = document.getElementById('img1')/////////////////////////////
        img1.style.top = yPos+'px';
        function changePos() {
            width = document.body.clientWidth
            height = document.body.clientHeight;
            Hoffset = img1.offsetHeight;
            Woffset = img1.offsetWidth;
            img1.style.left = xPos + document.body.scrollLeft + 'px';
            img1.style.top = yPos + document.body.scrollTop + 'px';
            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.style.visibility = "visible";
            interval = setInterval('changePos()', delay);
        }
        function pause_resume() {
            if (pause) {
                clearInterval(interval);
                pause = false;
            }
            else {
                interval = setInterval('changePos()', delay);
                pause = true;
            }
        }
        start();
    </script>

不要用id直接引用对象，通过document.getElementById

千幕之夜 2015-11-04