function CheckSub(id)
{	
	
	//	ID's van submenus
	
	submenus = new Array("aanmelden","uitzendbureau","contact");
	
	//	bepalen welk submenu we tonen
	
	for (i=0; i<submenus.length; i++)
	{
		if (submenus[i] == id) 
		{ 
			if (obj = document.getElementById(id))
			{
				obj.style.display = 'block';
			}
		}
		else 
		{ 
			if (obj = document.getElementById(submenus[i]))
			{
				obj.style.display = 'none';
			}
		}
	}
}