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) {
		id24_x_over = newImage("images/24-x_over.jpg");
		id11_k_over = newImage("images/11-k_over.jpg");
		id14_n_over = newImage("images/14-n_over.jpg");
		id12_l_over = newImage("images/12-l_over.jpg");
		id15_o_over = newImage("images/15-o_over.jpg");
		id16_p_over = newImage("images/16-p_over.jpg");
		id18_r_over = newImage("images/18-r_over.jpg");
		id13_m_over = newImage("images/13-m_over.jpg");
		id17_q_over = newImage("images/17-q_over.jpg");
		id19_s_over = newImage("images/19-s_over.jpg");
		id20_t_over = newImage("images/20-t_over.jpg");
		id22_v_over = newImage("images/22-v_over.jpg");
		id21_u_over = newImage("images/21-u_over.jpg");
		id23_w_over = newImage("images/23-w_over.jpg");
		preloadFlag = true;
	}
}