用JavaScript制作会反弹的浮动图片
作者:电脑爱好者 来源:电脑爱好者 添加时间:2006-5-21 9:22:09< div id="img" style="position:absolute;">
< a href="http://www.eschool.com.cn" target="_blank">
< img src="/edu/files/pic/2006-5/21/0652109220958733.gif" >
< /a>
< /div>
< SCRIPT LANGUAGE="JavaScript">
< !-- Begin
var xPos = 20;
var yPos = document.body.clientHeight;
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;
img.style.top = yPos;
function changePos() {width = document.body.clientWidth;height =document.body.clientHeight;Hoffset = img.offsetHeight;Woffset = img.offsetWidth;
img.style.left = xPos + document.body.scrollLeft;img.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() {img.visibility = "visible";interval = setInterval(´changePos()´, delay);}
start();
// End -- >
< /script >
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