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) {
ysm_name_over = newImage("osa/resources/headers/ysm_name-over.gif");
ysminfo_over = newImage("osa/resources/headers/ysminfo-over.gif");
library_over = newImage("osa/resources/headers/library-over.gif");
calendar_over = newImage("osa/resources/headers/calendar-over.gif");
directories_over = newImage("osa/resources/headers/directories-over.gif");
search_over = newImage("osa/resources/headers/search-over.gif");
home_over = newImage("osa/resources/headers/home-over.gif");
education_over = newImage("osa/resources/headers/education-over.gif");
admissions_over = newImage("osa/resources/headers/admissions-over.gif");
student_research_over = newImage("osa/resources/headers/student_research-over.gif");
financial_aid_over = newImage("osa/resources/headers/financial_aid-over.gif");

jump_over = newImage("osa/resources/footers/jump-over.gif");
ynhh_over = newImage("osa/resources/footers/ynhh-over.gif");
yale_over = newImage("osa/resources/footers/yale-over.gif");

preloadFlag = true;
}
}