本文实例讲述了jQuery实现鼠标响应式透明度渐变动画效果。分享给大家供大家参考，具体如下：
先来看看运行效果：
具体代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>js动画-透明度变化</title>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.js"></script>
<style>
* {
margin: 0;
padding: 0;
font-family:"微软雅黑"
}
#box{
height:100px;
width:100px;
background-color:#0099CC;
margin-top:200px;
position:relative;
/*透明度变化*/
left:0px;
filter:alpha(opacity:30);
opacity:0.3;
}
span{
display:block;
color:blue;
width:25px;
height:100px;
background-color:#FFFF99;
position:absolute;
left:100px;
}
</style>
</head>
<body>
<div id="box">
<span>移动</span>
</div>
<script>
window.onload=function(){
var div1=document.getElementById("box");
div1.onmouseover=function(){
startMove(100);
}
div1.onmouseout=function(){
startMove(30);
}
}
var timer=null;
var alpha=30;
function startMove(itarget){
clearInterval(timer);
var div1=document.getElementById("box");
timer=setInterval(function(){
var speed=0;
if(alpha>itarget){
speed=-10;
}else{
speed=10;
}
if(alpha==itarget){
clearInterval(timer);
}else{
alpha+=speed;
div1.style.filter="alpha(opacity:"+alpha+")";
div1.style.opacity=alpha/100;
}
},100)
}
</script>
</body>
</html>
希望本文所述对大家jQuery程序设计有所帮助。
