// rollover functions
function registerImage(imgName) {
	eval(imgName + "over = new Image()");
	eval(imgName + "over.src = \"/images/" + imgName + "_on.gif\"");
	eval(imgName + " = new Image()");
	eval(imgName + ".src = \"/images/" + imgName + "_off.gif\"");
}

function on(imgID) {
	img = document.getElementById(imgID);
	img.src = eval(imgID + "over.src");
}

function off(imgID) {
	img = document.getElementById(imgID);
	img.src = eval(imgID + ".src");
}

//register top navigation rollovers
registerImage("home");
registerImage("plans");
registerImage("support");
registerImage("payments");
registerImage("contact");