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/rhessidatacenter/img/cactus_cme_tracking2.gif', 'cactus_cme_tracking');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/solarsoft_latest_events2.gif', 'solarsoft_latest_events');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/latest_solar_images2.gif', 'latest_solar_images');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/solar_monitor2.gif', 'solar_monitor');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/flare_list2.gif', 'flare_list');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/science_nuggets2.gif', 'science_nuggets');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/flight_data_at_eth2.gif', 'flight_data_at_eth');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/flight_data_at_gsfc2.gif', 'flight_data_at_gsfc');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/goes_sxi2.gif', 'goes_sxi');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/hedc_quicklook_browser2.gif', 'hedc_quicklook_browser');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/farside_images2.gif', 'farside_images');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/quicklook_browser2.gif', 'quicklook_browser');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/goes_data2.gif', 'goes_data');
setrollover('http://hesperia.gsfc.nasa.gov/rhessidatacenter/img/goes_event_browser2.gif', 'goes_event_browser');