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) {
		gk_over = newImage("/kids/hmm/graphics/idx_btn_gk_over.gif");
		g1_over = newImage("/kids/hmm/graphics/idx_btn_g1_over.gif");
		g2_over = newImage("/kids/hmm/graphics/idx_btn_g2_over.gif");
		g3_over = newImage("/kids/hmm/graphics/idx_btn_g3_over.gif");
		g4_over = newImage("/kids/hmm/graphics/idx_btn_g4_over.gif");
		g5_over = newImage("/kids/hmm/graphics/idx_btn_g5_over.gif");
		g6_over = newImage("/kids/hmm/graphics/idx_btn_g6_over.gif");
		preloadFlag = true;
	}
}