window.addEvent('domready', function() {
    // Zebra stripes
    var stripe_list = function (some_elements) {
        var counter = 0;
        $$(some_elements).each( function(li) {
            counter++;
            li.removeClass('alt');   
            if (!(( counter % 2 ) == 0) ) {
                li.addClass('alt');   
            }
        }.bind( this ));
    };
    var striper = function() {
        var uls = $('stripes').getElementsByTagName('ul');
        $each(uls, function(list, index){
            stripe_list(list.getElementsByTagName('li'));
        });
    };
    striper(); // Go zebra stripes!
});