/* function on(a){
	document.getElementById('mnv'+a).className="mnva";
}
function off(a){
	document.getElementById('mnv'+a).className="mnv";
} */
function on(a){
	a.className="mnva";
}
function off(a){
	a.className="mnv";
}

function chIMG(obj,k){
	s=obj.src;
	n=s.lastIndexOf(".");
	document.getElementById("img_big").src=s.substring(0,n)+s.substring(n,s.length);
	document.getElementById("img_sign").innerHTML = k;
}