function fn_go(strUrl) {
	window.location.href = strUrl;
}

function fn_update() {
	location.reload();
}

function fn_back() {
  	history.back();
}

function fn_back2() {
  	history.go(-2);
}

function fn_back_n(n) {
  	history.go(-n);
}

function fn_play_sound(filename) { 

	suono.src =  filename;
}