var PreviousSection = 0;
var CurrentSection = 0;

function SectionInit()
{
	var Cnt;
	var SectionID;

	CurrentSection = 0;
	SetVisibility(CurrentSection.toString(10), "visible");
	for (SectionID = 1; SectionID <= 15; ++SectionID)
		SetVisibility(SectionID.toString(10), "hidden");
}
function ToggleSection(SectionNumber)
{
	var SectionString;

	PreviousSection = CurrentSection;
	SectionString = PreviousSection.toString(10);
	SetVisibility(SectionString, "hidden");
	if (CurrentSection & SectionNumber)
		CurrentSection &= (0xFFFFFFFF ^ SectionNumber) ;
	else
		CurrentSection |= SectionNumber;
	SectionString = CurrentSection.toString(10);
	SetVisibility(SectionString, "visible");
}