new mask for Brazil-São Paulo celphones (jquery)

br_sp_cel_mask.js

$('#cel').mask("(99) 9999-9999?9").live('focusout', function(event) {
    var target, phone, element;
    target = (event.currentTarget) ? event.currentTarget : event.srcElement;
    phone = target.value.replace(/\D/g, '');
    element = $(target);
    element.unmask();
    if(phone.length > 10) {
        element.mask("(99) 99999-999?9");
    } else {
        element.mask("(99) 9999-9999?9");  
    }
});