function OpenSub(ID)
{
	var sub=document.getElementById(ID);
	CloseAllSubs();
	sub.style.display="block";	
}

function CloseAllSubs()
{
	var N=0;
	var ID="Sub"+N;
	var sub=document.getElementById(ID);
	
	while(sub)
	{
		sub.style.display="none";
		sub=document.getElementById("Sub"+N);
		N++;
		ID="Sub"+N;
	}

}