var someCount = 0;
var some_pics = new Array();

function preloadSome(name) {
	some_pics[someCount] = new Array(3);
	some_pics[someCount][0] = name;
	some_pics[someCount][1] = new Image();
	some_pics[someCount][1].src = "images/" + name + "_off.gif";
	some_pics[someCount][2] = new Image();
	some_pics[someCount][2].src = "images/" + name + "_on.gif";
	someCount++;
}
function setImageSrc(name, k, n) {document.images[name].src = some_pics[k][n].src;}