var image_paths = [];
image_paths[0] = "images/about.png";
image_paths[1] = "images/about_on.png";
image_paths[2] = "images/events.png";
image_paths[3] = "images/events_on.png";
image_paths[4] = "images/administration.png";
image_paths[5] = "images/administration_on.png";
image_paths[6] = "images/classroom.png";
image_paths[7] = "images/classroom_on.png";
image_paths[8] = "images/school_life.png";
image_paths[9] = "images/school_life_on.png";
image_paths[10] = "images/contact.png";
image_paths[11] = "images/contact_on.png";

var image_cache = [];

for (var i=0; i<image_paths.length; i++) {
image_cache[i] = new Image();
image_cache[i].src = image_paths[i];
}

function imageRollover(img, imgSrc) {
img.src = imgSrc;
}