function ShowNav(iParentID)
{
	var divName = document.getElementById('divCat' + iParentID);
	
	if(divName)
	{
		if(divName.style.display == 'block')
		{
			divName.style.display = 'none';	
		}
		else
		{
			divName.style.display = 'block';
		}
	}
}