javascript 浮动 javascript浮动广告 javascript 浮动层 javascript效果 javascript特殊效果 浮动效果 网页浮动图片效果 doctype 浮动效果 javascript javascript教程
一个不停浮动的图片,遇到浏览器的任何一边,就会改变浮动的方向,如同一个弹球一样。这种效果主要用于网站广告,代码如下,将以下代码保存为htm文件就可以运行了。
<div id="img" style="position:absolute; left:35px; top:556px; width:120;
height:172">
<img src=http://www.jz123.cn/text/"injob.jpg" width=100 height=100></img>
</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>