<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>密码强度</title>
<script type="text/javascript" src="jquery.min.js"></script>
<style type="text/css">
/*密码强度*/
.pw-strength {clear: both;position: relative;top: 8px;width: 180px;}
.pw-bar{background: url(pwd-1.png) no-repeat;height: 14px;overflow: hidden;width: 179px;}
.pw-bar-on{background: url(pwd-2.png) no-repeat; width:0px; height:14px;position: absolute;top: 1px;left: 2px;transition: width .5s ease-in;-moz-transition: width .5s ease-in;-webkit-transition: width .5s ease-in;-o-transition: width .5s ease-in;}
.pw-weak .pw-defule{ width:0px;}
.pw-weak .pw-bar-on {width: 60px;}
.pw-medium .pw-bar-on {width: 120px;}
.pw-strong .pw-bar-on {width: 179px;}
.pw-txt {padding-top: 2px;width: 180px;overflow: hidden;}
.pw-txt span {color: #707070;float: left;font-size: 12px;text-align: center;width: 58px;}</style> <script type="text/javascript">
$(function(){
$('#pass').keyup(function () {
var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\\W).*$", "g");
var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g");
var enoughRegex = new RegExp("(?=.{6,}).*", "g"); if (false == enoughRegex.test($(this).val())) {
$('#level').removeClass('pw-weak');
$('#level').removeClass('pw-medium');
$('#level').removeClass('pw-strong');
$('#level').addClass(' pw-defule');
//密码小于六位的时候，密码强度图片都为灰色
}
else if (strongRegex.test($(this).val())) {
$('#level').removeClass('pw-weak');
$('#level').removeClass('pw-medium');
$('#level').removeClass('pw-strong');
$('#level').addClass(' pw-strong');
//密码为八位及以上并且字母数字特殊字符三项都包括,强度最强
}
else if (mediumRegex.test($(this).val())) {
$('#level').removeClass('pw-weak');
$('#level').removeClass('pw-medium');
$('#level').removeClass('pw-strong');
$('#level').addClass(' pw-medium');
//密码为七位及以上并且字母、数字、特殊字符三项中有两项，强度是中等
}
else {
$('#level').removeClass('pw-weak');
$('#level').removeClass('pw-medium');
$('#level').removeClass('pw-strong');
$('#level').addClass('pw-weak');
//如果密码为6为及以下，就算字母、数字、特殊字符三项都包括，强度也是弱的
}
return true;
});
})
</script> </head>
<body> <table style="width:320px;margin:40px auto;">
<tr>
<th>密码</th>
<td><span class="tbl-txt"><input id="pass" class="input-style" size="30" maxlength="30" name="pass" type="text" /></span></td>
</tr>
<tr>
<th></th>
<td id="level" class="pw-strength">
<div class="pw-bar"></div>
<div class="pw-bar-on"></div>
<div class="pw-txt">
<span>弱</span>
<span>中</span>
<span>强</span>
</div>
</td>
</tr>
</table> </body>
</html>
下载地址：http://pan.baidu.com/s/1bn5A1Rp