JavaScript注册时密码强度校验代码

<input name="password" type="PassWord" onKeyUp="CheckIntensity(this.value)"><table border="0" cellpadding="0" cellspacing="0"><tr align="center"><td id="pwd_Weak" class="pwd pwd_c"> </td><td id="pwd_Medium" class="pwd pwd_c pwd_f">无</td><td id="pwd_Strong" class="pwd pwd_c pwd_c_r"> </td></tr></table>

.pwd{width:50px;height:20px;line-height:14px;padding-top:2px;} .pwd_f{color:#BBBBBB;} .pwd_c{background-color:#F3F3F3;border-top:1px solid #D0D0D0;border-bottom:1px solid #D0D0D0;border-left:1px solid #D0D0D0;} .pwd_Weak_c{background-color:#FF4545;border-top:1px solid #BB2B2B;border-bottom:1px solid #BB2B2B;border-left:1px solid #BB2B2B;} .pwd_Medium_c{background-color:#FFD35E;border-top:1px solid #E9AE10;border-bottom:1px solid #E9AE10;border-left:1px solid #E9AE10;} .pwd_Strong_c{background-color:#3ABB1C;border-top:1px solid #267A12;border-bottom:1px solid #267A12;border-left:1px solid #267A12;} .pwd_c_r{border-right:1px solid #D0D0D0;} .pwd_Weak_c_r{border-right:1px solid #BB2B2B;} .pwd_Medium_c_r{border-right:1px solid #E9AE10;} .pwd_Strong_c_r{border-right:1px solid #267A12;}

function CheckIntensity(pwd) {    var Mcolor, Wcolor, Scolor, Color_Html;        var m = 0;       //匹配数字    if (//d+/.test(pwd)) {      debugger;      m++;    };    //匹配字母    if (/[A-Za-z]+/.test(pwd)) {           m++;    };    //匹配除数字字母外的特殊符号    if (/[^0-9a-zA-Z]+/.test(pwd)) {            m++;    };        if (pwd.length <= 6) { m = 1; }    if (pwd.length <= 0) { m = 0; }        switch (m) {      case 1:        Wcolor = "pwd pwd_Weak_c";        Mcolor = "pwd pwd_c";        Scolor = "pwd pwd_c pwd_c_r";        Color_Html = "弱";        break;      case 2:        Wcolor = "pwd pwd_Medium_c";        Mcolor = "pwd pwd_Medium_c";        Scolor = "pwd pwd_c pwd_c_r";        Color_Html = "中";        break;      case 3:        Wcolor = "pwd pwd_Strong_c";        Mcolor = "pwd pwd_Strong_c";        Scolor = "pwd pwd_Strong_c pwd_Strong_c_r";        Color_Html = "强";        break;      default:        Wcolor = "pwd pwd_c";        Mcolor = "pwd pwd_c pwd_f";        Scolor = "pwd pwd_c pwd_c_r";        Color_Html = "无";        break;    }    document.getElementById('pwd_Weak').className = Wcolor;    document.getElementById('pwd_Medium').className = Mcolor;    document.getElementById('pwd_Strong').className = Scolor;    document.getElementById('pwd_Medium').innerHTML = Color_Html;  }