function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}

function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
}
}
}

var preloadFlag = false;
function preloadImages() {
if (document.images) {
about_over = newImage("/ARWH/graphics/about-over.gif");
expertise_over = newImage("/ARWH/graphics/expertise-over.gif");
CDisease_over = newImage("/ARWH/graphics/CDisease-over.gif");
disease_over = newImage("/ARWH/graphics/disease-over.gif");
links_over = newImage("/ARWH/graphics/links-over.gif");
research_over = newImage("/ARWH/graphics/research-over.gif");
bulletin_over = newImage("/ARWH/graphics/bulletin-over.gif");
bibli_over = newImage("/ARWH/graphics/bibli-over.gif");
news_over = newImage("/ARWH/graphics/news-over.gif");
employment_over = newImage("/ARWH/graphics/employment-over.gif");
iCase_over = newImage("/ARWH/graphics/iCase-over.gif");
preloadFlag = true;
}
}