function rolloversInit(className)
{ 
    var rollovers = getElementsByClassName(className, document, 'img');
    for(var i in rollovers)
    {
        addEvent(rollovers[i], 'mouseover', makeHandler(overState(rollovers[i])));
        addEvent(rollovers[i], 'mouseout', makeHandler(offState(rollovers[i])));
    }
}

addEvent(window, 'load', function() { 
    rolloversInit('rollover');
} );