function FIND(item)
{
	if (document.getElementById) return (document.getElementById(item));
	return (false);
}

function existsSection(id)
{
	if(FIND(id))
		return true;
	else
		return false;
}

function openSection(id, dir)
{
	if(FIND(id))
	{
		if(dir)
			FIND(id).style.display = "block";
		else
			FIND(id).style.display = "none";
	}
	else
	{		
		alert("Wrong section ID!");
	}
}

function isSectionOpen(id)
{
	if(FIND(id))
	{
		return FIND(id).style.display == "block" ? true : false ;
	}
	else
	{
		alert("Wrong section ID!");
	}
}

function changeClass(id, cls)
{
	if(FIND(id))
	{
		FIND(id).className = cls;
	}
}