jquery操作css3动画
我想在点击card_options_btn判断动画走到0点进行js操作要怎么改
比如为0点弹出个alert
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="../jquery.1.9.1.min.js" ></script>
<style type="text/css">
html{background-color: #fff;font-family: Arial, sans-serif;font-size: 12px;color: #000;}
body{text-rendering: optimizeLegibility;-webkit-font-smoothing: antialiased;-webkit-text-size-adjust: 100%;width: 100%;margin: 0;padding: 0}
a {color: #000;text-decoration: none;}
#page{width: 1125px;margin: 0px auto;display: block;margin-top: 10px;height: 274px;}
#single_column{background-color: #fff;padding: 30px;padding-bottom: 50px;}
#card_options_container h1{font-family:"Avalon-Medium", Roboto, Arial, sans-serif;font-weight:normal;color:#000;font-size:2em;text-transform:uppercase;font-weight:bold;margin-bottom:20px;text-align: center;}
.register_signin_switcher {margin: 20px 0;text-align: center;}
#card_options_container .card_options_btn {display: inline-block;padding: 20px;min-width: 280px;font-size: 18px;text-transform: uppercase;margin: 10px 10px 20px;border: 2px solid #000;}
.card_options_btn:hover{color:red;border: 2px solid red !important;}
.clear_float {overflow: hidden;width: 100%;clear: both;}
.base-color {text-decoration: underline;color: #d50032;}
@keyframes autoh{
form {height:auto;}
to {height: 0;}
}
@-webkit-keyframes autoh{
form {height:auto;}
to {height: 0;}
}
</style>
</head>
<body>
<div id="page">
<div id="single_column">
<div id="card_options_container">
<h1>Register with vmei.com</h1>
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Java