/* by Brad Harris, http://www.selfcontained.us/ */
$(function() {
    $('.rollover').hover(function() {
        var currentImg = $(this).attr('src');
        $(this).attr('src', $(this).attr('hover'));
        $(this).attr('hover', currentImg);
    }, function() {
        var currentImg = $(this).attr('src');
        $(this).attr('src', $(this).attr('hover'));
        $(this).attr('hover', currentImg);
    });
});