jQuery filter SELECT options based on Radio PRE - selected on load

Question

So I posted the question yesterday (Link) and got the answer I needed but for the life of me I can't get this to happen if the value is selected on the body load. it only works if the user clicks the radio then it filters the options. HELP Please!!!

the Function

jQuery.fn.filterOn = function(radio, values) {
    return this.each(function() {
        var select = this;
        var options = [];
        $(select).find('option').each(function() {
            options.push({value: $(this).val(), text: $(this).text()});
        });
        $(select).data('options', options);
        $(radio).click(function() {
            var options = $(select).empty().data('options');
            var haystack = values[$(this).attr('id')];
            $.each(options, function(i) {
                var option = options[i];
                if($.inArray(option.value, haystack) !== -1) {
                    $(select).append(
                    $('<option>').text(option.text).val(option.value)
                    );
                }
            });
        });            
    });
};

How to call

$(function() {
    $('#theOptions').filterOn('input:radio[name=abc123]', {
        'abc': ['a','b','c'],
        '123': ['1','2','3']        
    });
});

Thanks in advance

BTW Here is a DEMO of it in action

Answer 1

$(document).ready(function(){
    $('input:radio:checked').click(); 
});

That'll get it done for your example.