jquery判断密码强度的验证代码

$('#pass').keyup(function(e) {
 var strongRegex = new RegExp("^(?=.{8,})(?=.[A-Z])(?=.[a-z])(?=.[0-9])(?=.\\W).$", "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;
});

<input type="password" name="pass" id="pass" />
<span id="passstrength"></span>