window.addEvent('domready', function(){
    $$('.moreInfoWrapper').each(function(item){
        var thisSlider = new Fx.Slide(item.getElement('.moreInfo'), {
            duration: 500
        });
        thisSlider.hide();
        item.getElement('.divToggle').addEvent('click', function(){
            thisSlider.toggle();
        }); // you might want to stop events here with e.stop if the toggle element is a link or button
    });
});