<!DOCTYPE html>
<html>
<head>
<script src="jquery.js"></script>
<script>
$(document).ready(function(){
$("#button1").mouseover(function(){
$(".div1").stop().animate({opacity:1},1000);
$(".div2").stop().animate({opacity:1},1000);
$(".div3").stop().animate({opacity:1},1000);
});
$("#button1").mouseleave(function(){
$(".div1").stop().animate({opacity:0},1000);
$(".div2").stop().animate({opacity:0},1000);
$(".div3").stop().animate({opacity:0},1000);
});
});
</script>
</head>
<body>
<button id="button1">鼠标放在这里，使三个矩形淡入</button>
<div class="div1" style="width:80px;height:80px;opacity:0;background-color:red;"></div>
<br>
<div class="div2" style="width:80px;height:80px;opacity:0;background-color:green;"></div>
<br>
<div class="div3" style="width:80px;height:80px;opacity:0;background-color:blue;"></div>
</body>
</html>另外
function () { $(".div1").animate({ 'opacity': 0 }，{ queue: false, duration: 1000 }); },
function () { $(".div1").animate({ 'opacity': 1 }， { queue: false, duration: 1000 }); }
也可以。