if(navigator.appVersion.charAt(0)>=3){
	if(document.images){
		var img = new Array();

		img[0] = new Image(); img[0].src = "../images/mn_off.gif";
		img[1] = new Image(); img[1].src = "../images/mn_over.gif";

	}
}
function chg_img(a,b){
	if(document.images){
		document.images[a].src=img[b].src;
	}
}