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;
}
alert(CharMode("A".charCodeAt()));
返回密码等级的函数
//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=0;i<4;i++){
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=0;i<sPW.length;i++){
//密码模式
Modes|=CharMode(sPW.charCodeAt(i));
}
return bitTotal(Modes);
}