JavaScript注册时密码强度校验代码

密码强度有4个状态，分别如下图。

无密码状态

密码低级状态

密码中级状态

密码高级状态

实现的代码主要如下：

HTML代码

 
无
 

CSS代码

.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;}

JS代码

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;
  }  

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