img = new Array();{
	img[0]  = new Image; img[0].src  = "../img/menu/1.gif";
	img[1]  = new Image; img[1].src  = "../img/menu/1_on.gif";
	img[2]  = new Image; img[2].src  = "../img/menu/2.gif";
	img[3]  = new Image; img[3].src  = "../img/menu/2_on.gif";
	img[4]  = new Image; img[4].src  = "../img/menu/3.gif";
	img[5]  = new Image; img[5].src  = "../img/menu/3_on.gif";
}
function chg_img(a,b){ 
	document.images[b].src=img[a].src;
	return false;
}