var currentMenu = null;
function naytaMenu(n){
	if(currentMenu){
		document.getElementById(currentMenu).style.display = "none";
		currentMenu = null;
	}
	if(n){
		document.getElementById(n).style.display = "block";
		currentMenu = n;
	}
}

document.onmouseup = function (){
	naytaMenu();
}