Default
After entering the correct email address
Default
After entering the correct email address
<!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>
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