本文实例讲述了Javascript实现飞动广告效果的方法。分享给大家供大家参考。具体实现方法如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>飞动的广告</title>
<style type="text/css">
body,div,p
{
margin:0;
padding:0;
font-size:14px;
}
#divMain
{
width:200px;
height:800px;
}
</style>
<script type="text/javascript">
var tmrID;
var x = 1;
var y = 1;
function moveAD() {
var divFly = document.getElementById("divFly");
var moveX = parseInt(divFly.style.left) + x * 5;
var moveY = parseInt(divFly.style.top) + y * 5;
//divFly.offsetWidth
if ((moveX + divFly.offsetWidth) >= document.body.clientWidth) {
x = -1;
}
if ((moveY + divFly.offsetHeight) >= document.body.clientHeight) {
y = -1;
}
if (moveX <= 0) {
x = 1;
}
if (moveY <= 0) {
y = 1;
}
divFly.style.left = moveX;
divFly.style.top = moveY;
}
function ClearTimer() {
clearInterval(tmrID);
}
function fly() {
tmrID = setInterval(moveAD, 20);
}
window.onload = function () {
var divFly = document.getElementById("divFly");
divFly.onmouseover = function () {
ClearTimer();
}
divFly.onmouseout = function () {
fly();
}
fly();
}
function closeAD() {
ClearTimer();
var divFly = document.getElementById("divFly");
divFly.style.display = "none";
}
</script>
</head>
<body>
<div id="divMain"></div>
<div id="divFly" style="position:absolute;top:0;left:0;border:1px solid green;">
<img src="../images/fly.gif" height="60px" width="60px" />
<p><a href="javascript:void(0)" onclick="closeAD()">关闭</a></p>
</div>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。