<!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 id="Head1" runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>密码强度</title>
</head>
<script language="javascript" type="text/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颜色
function pwStrength(pwd){
O_color="#e0f0ff";
L_color="#FF0000";
M_color="#FF9900";
H_color="#33CC00";
if (pwd==null||pwd==‘‘){
Lcolor=Mcolor=Hcolor=O_color;
}
else
{
S_level=checkStrong(pwd);
//console.log(S_level);
switch(S_level)
{
case 0:
Lcolor=Mcolor=Hcolor=O_color;
break;
case 1:
Lcolor=L_color;
Mcolor=Hcolor=O_color;
break;
case 2:
Lcolor=Mcolor=M_color;
Hcolor=O_color;
break;
default:
Lcolor=Mcolor=Hcolor=H_color;
}
}
document.getElementById("strength_L").style.background=Lcolor;
document.getElementById("strength_M").style.background=Mcolor;
document.getElementById("strength_H").style.background=Hcolor;
return;
}
</script>
<style>
table td{ background:#E0F0FF;}
</style>
<body>
<form id="form1">
<div>
输入密码:
<input type="password" id="TextBox1" onkeyup="pwStrength(this.value)" onblur="pwStrength(this.value)"><br>
密码强度:
<table border="0" cellpadding="0" bordercolordark="#fdfeff" bordercolorlight="#99ccff" cellspacing="0"
style="width: 200px; display: inline; margin-top:2px;">
<tr>
<td id="strength_L" style="width: 100px; height: 19px;" align="center">弱</td>
<td id="strength_M" style="width: 100px; height: 19px;" align="center">中</td>
<td id="strength_H" style="width: 100px; height: 19px;" align="center">强</td>
</tr>
</table>
</div>
</form>
</body>
</html>
js 密码强度检测,布布扣,bubuko.com
js 密码强度检测