Incrementa campos hasmany-like usados nos formulários do cakephp

multiFields.js

multiField = function (buttonId, fieldSelector) {
    $('#' + buttonId).click(function() {
        div = $(fieldSelector + ':last').clone();
        inputs = $(div).find('input,select');
        $(inputs).each(function(i,e) {
            incrementInputIndexes(i,e)
        });
        $(fieldSelector + ':last').after(div);
    });
}


incrementInputIndexes = function (i,e) {
    index = $(e).attr('name').match(/[0-9]+/);
    n = parseInt(index[0],10) + 1;

    name = $(e).attr('name');
    name = name.replace(/[0-9]+/, n + '');

    $(e).attr('name', name);
    $(e).val('');
}