<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>图片淡出</title>
<style>
img{
display: block;
width: 230px;
height: 380px;
filter: alpha(opacity:30);
opacity: 0.3;
}
h3,img{
margin:0 auto;
text-align: center;
}
</style>
<script>
window.onload=function(){
var oImg=document.getElementById("img1");
timer=null;
var alpha=30;
function startMove(iTarget){
clearInterval(timer);
timer=setInterval(function(){
var iSpeed=0;
if (alpha<=iTarget) {
iSpeed=1;
}else{
iSpeed=-1;
}
if (alpha==iTarget) {
clearInterval(timer);
}else{
alpha+=iSpeed;
oImg.style.opacity=alpha/100;
oImg.style.filter=alpha+'(opacity:'+alpha+')'
}
},30);
}
oImg.onmouseover=function(){
startMove(100);
}
oImg.onmouseout=function(){
startMove(30);
}
}
</script>
</head>
<body>
<h3>图片动画淡出</h3>
<img src="timg.jpg" alt="" id="img1" />
</body>
</html>
鼠标滑过之前如下图：
鼠标划过图片，图片慢慢显示清晰，鼠标离开又回到初始状态，鼠标划上图片效果如下图：
