日期:2014-05-16 浏览次数:20361 次
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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>密码强度检测实例</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <script type='text/javascript' src='js/jquery-latest.js'></script> <script language=javascript> //CharMode函数 //测试某个字符是属于哪一类. function CharMode(iN){ if (iN>=48 && iN <=57) //数字 return 1; if (iN>=65 && iN <=90) //大写字母 return 2; if (iN>=97 && iN <=122) //小写 return 4; else return 8; //特殊字符 } //bitTotal函数 //计算出当前密码当中一共有多少种模式 function bitTotal(num){ modes=0; for (i=0;i<4;i++){ if (num & 1){ modes++; } num>>>=1; } return modes; } //checkStrong函数 //返回密码的强度级别 function checkStrong(sPW){ if (sPW.length<=4){ return 0; //密码太短 } Modes=0; for (i=0;i<sPW.length;i++){ //测试每一个字符的类别并统计一共有多少种模式. Modes|=CharMode(sPW.charCodeAt(i)); } return bitTotal(Modes); } //pwStrength函数 //当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的级别 function pwStrength(pwd){ if (pwd==null||pwd==''){ var result='安全系数危险!'; } else{ S_level=checkStrong(pwd); switch(S_level) { case 0: var result='安全系数危险!'; case 1: var result='安全系数低!'; break; case 2: var result='安全系数中!'; break; default: var result='安全系数高!'; } } $("#result").html(result); return; } </script> </head> <body> <form name=form1 action="" > 输入密码: :<input type=password size=10 onKeyUp=pwStrength(this.value) onBlur=pwStrength(this.value)/> <br>密码强度: <div id="result"></div> </form> </body> </html>
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