//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){ return bitTotal(Modes); } //pwStrength函数 function pwStrength(pwd){ document.getElementById("strength_L").style.background=Lcolor;
if (sPW.length<=4)
return 0; //密码太短
Modes=0;
for (i=0;i
Modes|=CharMode(sPW.charCodeAt(i));
}
//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
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_M").style.background=Mcolor;
document.getElementById("strength_H").style.background=Hcolor;
return;
}
script>