jQuery测试密码强度

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