<style>
.content{
width: 500px;
margin:0 auto;
}
.content .img1{
animation: zhazha 1s infinite;
}
.content .img2 {
animation: boom 1s 1;
}
@keyframes zhazha{
from{
transform: scale(0.8);
}to{
transform: scale(1.1);
}
}
@keyframes boom{
from{
transform: scale(0);
}to{
transform: scale(1);
}
}
</style>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/boom.js"></script>
</head>
<body>
<input type="button" class="btn" value="炸了炸了" />
<div class="content">
<p class="boom"></p>
<img class="img1" src="img/boom.jpg"/>
<img class="img2" src="img/booms.jpg"/>
</div>
<script>
$(function(){
$(".content").hide();
$(".btn").click(function(){
var time=3;
var set=setInterval(function(){
if(time>0){
$(".boom").text(time-- +"s");
$(".content").show();
$(".content .img2").hide();
}else{
$(".content .img1,p").hide();
$(".content .img2").show();
}
},1000);
})
})
</script>
原文：http://www.cnblogs.com/cutenana/p/7398327.html