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) {
		index_02_over = newImage("images/index_w.gif");
		index_01_over = newImage("images/index_m.gif");
		index_03_over = newImage("images/index_p.gif");
		butt_main_over = newImage("images/butt_main_g.gif");
		butt_price_over = newImage("images/butt_price_g.gif");
		butt_where_over = newImage("images/butt_where_g.gif");
		butt_mass_over = newImage("images/butt_mass_g.gif");
		butt_perform_over = newImage("images/butt_perform_g.gif");
		butt_weight_over = newImage("images/butt_weight_g.gif");
		butt_weider_over = newImage("images/butt_weider_g.gif");
		butt_schiff_over = newImage("images/butt_schiff_g.gif");
		butt_vic_over = newImage("images/butt_vic_g.gif");
		butt_bs_over = newImage("images/butt_bs_g.gif");
		preloadFlag = true;
	}
}