本文实例讲述了js实现图片漂浮效果的方法。分享给大家供大家参考。具体分析如下：
描述：打开网页就看到不停在飘动的图片，点击连接到其他页面；起到着重强调的效果！
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>test</title>
<style type="text/css">
#All{ width: 100%; height: 3000px;}
</style>
</head>
<body>
<div id="All">
<div id="img" style="position: absolute; z-index:99;">
<a href="#" target="_blank"><img src="Images/OPVTI.jpg" border="0" style="cursor: pointer;" style="cursor: pointer;" /></a>
<script language="JavaScript">
<!--Begin
var xPos = document.body.clientWidth - 20;
var yPos = document.body.clientHeight / 2;
var step = 1;
var delay = 10;
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);
}
function pause_resume() {
if (pause) {
clearInterval(interval);
pause = false;
} else {
interval = setInterval('changePos()', delay);
pause = true;
}
}
start();
// End -->
</script>
</div>
</div>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。