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楼主
发表于 2008-8-27 15:24
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- --------------------------------------------------------------------------------
- 脚本说明:
- 第一步:把如下代码加入<head>区域中
- <SCRIPT LANGUAGE="JavaScript">
- <!-- Begin
- var isNS = ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4));
- var _all = '';
- var _style = '';
- var wwidth, wheight;
- var ydir = '++';
- var xdir = '++';
- var id1, id2, id3;
- var x = 1;
- var y = 1;
- var x1, y1;
- if(!isNS) {
- _all='all.';
- _style='.style';
- }
- function getwindowsize() {
- clearTimeout(id1);
- clearTimeout(id2);
- clearTimeout(id3);
- if (isNS) {
- wwidth = window.innerWidth - 55;
- wheight = window.innerHeight - 50;
- } else {
- wwidth = document.body.clientWidth - 55;
- wheight = document.body.clientHeight - 50;
- }
- id3 = setTimeout('randomdir()', 20000);
- animate();
- }
- function randomdir() {
- if (Math.floor(Math.random()*2)) {
- (Math.floor(Math.random()*2)) ? xdir='--': xdir='++';
- } else {
- (Math.floor(Math.random()*2)) ? ydir='--': ydir='++';
- }
- id2 = setTimeout('randomdir()', 20000);
- }
- function animate() {
- eval('x'+xdir);
- eval('y'+ydir);
- if (isNS) {
- pic1.moveTo((x+pageXOffset),(y+pageYOffset))
- } else {
- pic1.pixelLeft = x+document.body.scrollLeft;
- pic1.pixelTop = y+document.body.scrollTop;
- }
- if (isNS) {
- if (pic1.top <= 5+pageYOffset) ydir = '++';
- if (pic1.top >= wheight+pageYOffset) ydir = '--';
- if (pic1.left >= wwidth+pageXOffset) xdir = '--';
- if (pic1.left <= 5+pageXOffset) xdir = '++';
- } else {
- if (pic1.pixelTop <= 5+document.body.scrollTop) ydir = '++';
- if (pic1.pixelTop >= wheight+document.body.scrollTop) ydir = '--';
- if (pic1.pixelLeft >= wwidth+document.body.scrollLeft) xdir = '--';
- if (pic1.pixelLeft <= 5+document.body.scrollLeft) xdir = '++';
- }
- id1 = setTimeout('animate()', 30);
- }
- // End -->
- </script>
- 第二步:在<body>区中加入如下代码
- <div id="pic1" style="position:absolute; visibility:visible; left:0px; top:0px; z-index:-1">
- <img src="image1.gif" tppabs="http://www.csdn.net/javascript/image1.gif" border="0">
- </div>
- <script language="javascript">
- var pic1=eval('document.'+_all+'pic1'+_style);
- </script>
- 第三步:把<body>区中内容改为:
- <body bgcolor="#fef4d9" OnLoad="getwindowsize()" OnResize="getwindowsize()">
-
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发表于 2008-8-27 21:17
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帮你顶点贴 坐沙发
