What is Jquery's equivalent of php's FILTER

Possible Duplicate:
Validate email address in Javascript?
JQuery email validation?

I would like to use filter_Validate_email to validate email.val() instead of what is below.

var email = $("#email");
var emailReg = /^[A-Z0-9._%+-]+@([A-Z0-9-]+.)+[A-Z]{2,4}$/i;


   if (!emailReg.test(email.val())) {
        email.addClass("error").focus();

    } else {

        email.removeClass("error");
    }

jQuery验证插件简单地保护了大量工作。

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