[导入]检验密码强度的JS类

<script type="text/javascript">
      var PasswordStrength ={
         Level : ["高，实在是高","还行啦","靠，这样也行"],
          LevelValue : [30,20,0],//强度值
          Factor : [1,2,5],//字符加数,分别为字母，数字，其它
         KindFactor : [0,0,10,20],//密码含几种组成的加数 
        Regex : [/[a-zA-Z]/g,/\d/g,/[^a-zA-Z0-9]/g] //字符正则数字正则其它正则
        }
        PasswordStrength.StrengthValue = function(pwd)
    {
           var strengthValue = 0;
           var ComposedKind = 0;
            for(var i = 0 ; i < this.Regex.length;i++)
           {
             var chars = pwd.match(this.Regex[i]);
             if(chars != null)
              {
                strengthValue += chars.length * this.Factor[i];
               ComposedKind ++;
             }
         }
         strengthValue += this.KindFactor[ComposedKind];
           return strengthValue;
      } 
        PasswordStrength.StrengthLevel = function(pwd)
      {
           var value = this.StrengthValue(pwd);
           for(var i = 0 ; i < this.LevelValue.length ; i ++)
          {
                if(value >= this.LevelValue[i] )
                   return this.Level[i];
         }
       }
       
        alert(PasswordStrength.StrengthLevel("23")); 
        alert(PasswordStrength.StrengthLevel("abcd123"));     
        alert(PasswordStrength.StrengthLevel("abcd!%23"));  
    </script>

文章来源:http://blog.163.com/fengmk2/blog/static/891324020069212330624