您的位置：首页 > Web前端 > JavaScript

js密码强度验证

2013-04-23 19:31 381 查看

<!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>

<title></title>

<script 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 = "#eeeeee"; L_color = "#FF0000"; M_color = "#FF9900"; H_color = "#33CC00";

if (pwd == null || pwd == '') {

Lcolor = Mcolor = Hcolor = O_color;

}

else {

S_level = checkStrong(pwd);

switch (S_level) {

case 0: Lcolor = Mcolor = Hcolor = O_color;

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>

</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:

<table width="217" border="1" cellspacing="0" cellpadding="1" bordercolor="#cccccc"

height="23" style='display: inline'>

<tr align="center" bgcolor="#eeeeee">

<td width="33%" id="strength_L">

弱

</td>

<td width="33%" id="strength_M">

中

</td>

<td width="33%" id="strength_H">

强

</td>

</tr>

</table>

</form>

<br /><br /><br />

</body>

</html>

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航