首先我们自己动手做一张背景为透明色的图片,格式可以自己定制,但最好是GIF动画的,这样可以增加动感效果,再把以下代码加入到HTML的任意位置,注意:把连接地址“href=”和图片的位置“src=”填写好。
<div id="img" style="position:absolute;">
<a href="路径/*.htm"><img src="路径/*.gif"border="0"></a>
</div
然后把以下代码复制到你的记事本里,选择文件-另存为,在输入框中键入"piao.js"(注意:引号千万不能少,以便保证你存储的文件的括展名是.js)
<!--
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 -->