function change1(x){
	name = x + "1";
	chgsrc = "common_img/menu/"+x+"2.gif";
	document.images[name].src = chgsrc;
}
function change2(x){
	name = x + "1";
	chgsrc = "common_img/menu/"+x+"1.gif";
	document.images[name].src = chgsrc;
}