Javascript / Jquery Credit Card Month Expiry Date Validator

var today = new Date();

var expDate = new Date($("#cart-expyear").val(),($("#cart-expmonth").val()-1)); // JS Date Month is 0-11 not 1-12 grrr

if(today.getTime() > expDate.getTime()) {

messages.push("Your Card is expired. Please check expiry date.");

}