怎么通过html,javascript 实现这个效果
如何通过html,javascript 实现这个效果
默认
邮箱输对了以后
------解决方案--------------------
默认
邮箱输对了以后
------解决方案--------------------
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>test</title>
<link rel="stylesheet" type="text/css" href="http://iconfont.cn/assets/application-7fe01c67f0bffcd30bd1ca90c54c3c2f.css" media="all"/>
<style type="text/css">
.wrap{ width:350px;border:1px solid #ccc;}
.wrap *{ display:inline-block;}
.text{width: 90%; border:none;}
.icon{ width:16px; height:16px; background:url(https://passport.jd.com/new/misc/skin/df/i/login-all-bg.png) -373px -111px no-repeat;}
.ok{ background-position:0 -241px;}
</style>
<script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.8.3/jquery.min.js"></script>
</head>
<body>
<div id="wrap" class="wrap"><input type="text" class="text" name="" id=""/><span class="icon"></span></div>
<script type="text/javascript">
function isEmail(val){
return /^[a-zA-Z0-9\._-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(val);
}
$('.text').keyup(function(){
var el = $(this).next();
if(isEmail($(this).val())){
el.addClass('ok');
} else {
el.removeClass('ok');
}
});
</script>
</body>
</html>