$(document).ready(function() {  
          var $password = $('#pass');  
          var $strength = $('#passstrength');  
       // Password strength check  
      $password.keyup(function(e) {  
        var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\\W).*$", "g");  
        var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g");  
        var enoughRegex = new RegExp("(?=.{6,}).*", "g");  
        if (!enoughRegex.test($password.val())) {  
          $strength.html('More Characters');  
        } else if (strongRegex.test($password.val())) {  
          $strength.className = 'ok';  
          $strength.html('Strong!');  
        } else if (mediumRegex.test($password.val())) {  
          $strength.className = 'alert';  
          $strength.html('Medium!');  
        } else {  
          $strength.className = 'error';  
          $strength.html('Weak!');  
        }  
      });  
    });  
    
  
     
  
    
      
  
      
       
Password Strength Checker