function ChangeSub(i){
	for (n=1; n<=5; n++){
		if (n!=i)
		    document.getElementById('sub'+n).style.display="none";
		else document.getElementById('sub'+n).style.display="block";
	}
}


function ChangeMenu(i){
	for (n=1; n<=4; n++){
		if (n!=i){
		    document.getElementById('left_menu'+n).style.display="none";
			document.getElementById('menu'+n).style.display="none";
		}
		else 
		{
			document.getElementById('left_menu'+n).style.display="block";
			document.getElementById('menu'+n).style.display="block";
		}
	}
}