if (document.images) {
var program = new Image();
program.src="homepage_buttons/program.gif";
var program_on = new Image();
program_on.src="homepage_buttons/program_on.gif";

var current = new Image();
current.src="homepage_buttons/current.gif";
var current_on = new Image();
current_on.src="homepage_buttons/current_on.gif";

var prospective = new Image();
prospective.src="homepage_buttons/prospective.gif";
var prospective_on = new Image();
prospective_on.src="homepage_buttons/prospective_on.gif";

var about = new Image();
about.src="homepage_buttons/about.gif";
var about_on = new Image();
about_on.src="homepage_buttons/about_on.gif";

var administration = new Image();
administration.src="homepage_buttons/contact.gif";
var administration_on = new Image();
administration_on.src="homepage_buttons/contact_on.gif";

}

function activate(imgName) {
	if(document.images)
		document.images[imgName].src = eval(imgName + "_on.src");
}

function inactivate(imgName) {
	if(document.images)
		document.images[imgName].src = eval(imgName + ".src");
}