var rollOverArr=new Array();
function setrollover(OverImgSrc,pageImageName)
{
if (! document.images)return;
if (pageImageName == null)
    pageImageName = document.images[document.images.length-1].name;
rollOverArr[pageImageName]=new Object;
rollOverArr[pageImageName].overImg = new Image;
rollOverArr[pageImageName].overImg.src=OverImgSrc;
}

function rollover(pageImageName)
{
if (! document.images)return;
if (! rollOverArr[pageImageName])return;
if (! rollOverArr[pageImageName].outImg)
    {
    rollOverArr[pageImageName].outImg = new Image;
    rollOverArr[pageImageName].outImg.src = document.images[pageImageName].src;
    }
document.images[pageImageName].src=rollOverArr[pageImageName].overImg.src;
}

function rollout(pageImageName)
{
if (! document.images)return;
if (! rollOverArr[pageImageName])return;
document.images[pageImageName].src=rollOverArr[pageImageName].outImg.src;
}

setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/home_red2.gif', 'home');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/schedule_red2.gif', 'schedule');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/program_red2.gif', 'program');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/lectures_red2.gif', 'lectures');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/exercises_red2.gif', 'exercises');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/faculty_red2.gif', 'faculty');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/application_red2.gif', 'application');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/location_red2.gif', 'location');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/transportation_red2.gif', 'transportation');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/accommodations_red2.gif', 'accommodations');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/recreation_red2.gif', 'recreation');
setrollover('http://hesperia.gsfc.nasa.gov/summerschool/images/contact_red2.gif', 'contact');