<div id='your_id' style='z-index: 100; left: 2px; width: 108px; position: absolute; top: 43px; height: 108px; visibility: visible;'>
<a href='http://codingstandards.iteye.com/' target='_blank'>
<img src='http://124.232.156.170/nxsyzx/zhaosheng/baoming.gif' width='108' height='108' border='0'/>
</a>
</div>
用于控制图片运动的JS代码
(function(id){
var xPos = 2;
var yPos = 43;
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(id);
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();
})('your_id');
PS:本文中的代码参考了网络上常用的浮动广告代码,但做了一些修改,更加实用。它限制了变量的作用域,能够直接嵌入到某些门户CMS系统中。