<html>
<head>
<title>JS判断密码强度</title>
<script language=javascript>
//判断输入密码的类型
function CharMode(iN){
if (iN>=48 &&iN <=57) //数字
return 1
if (iN>=65 &&iN <=90) //大写
return 2
if (iN>=97 &&iN <=122) //小写
return 4
else
return 8
}
//bitTotal函数
//计算密码模式
function bitTotal(num){
modes=0
for (i=0i<4i++){
if (num &1) modes++
num>>>=1
}
return modes
}
//返回强度级别
function checkStrong(sPW){
if (sPW.length<=4)
return 0//密码太短
Modes=0
for (i=0i<sPW.lengthi++){
//密码模式
Modes|=CharMode(sPW.charCodeAt(i))
}
return bitTotal(Modes)
}
//显示颜色
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="" >
密码:<input type=password size=8 onKeyUp=pwStrength(this.value) onBlur=pwStrength(this.value)>
<br>密码强度:
<table width="210" border="1" cellspacing="0" cellpadding="1" bordercolor="#eeeeee" height="22" style='display:inline'>
<tr align="center" bgcolor="#f5f5f5">
<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>
</body>
</html>
用户输入一个字符串做为密码,判断密码强度,规则为:密码长度小于8弱密码,密码长度大于等于8且包含至少2种字符为中等强度、密码包含3种字符为强、包含全部4种字符为极强。 提示: string.digits 可返回'0123456789' string.ascii_lowercase 可返回'abcdefghijklmnopqrstuvwxyz' string.ascii_uppercase 可返回'ABCDEFGHIJKLMNOPQRSTUVWXYZ' string.punctuation 可返回'!"#$%&'()*+,-./:<=>?@[\]^_`{|}~'输入一个字符串密码强度的判断结果,分:弱、中、强、极强,共四种欢迎分享,转载请注明来源:内存溢出
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