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<!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>
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原文地址：http://www.cnblogs.com/xuhang/p/4765873.html
