function changeClass(obj, cName)
{
	obj.className = cName;
}

function switchClass(obj, firstClass, secondClass)
{
	if( obj )
	{
		if (obj.className == firstClass) {
			changeClass(obj, secondClass);
		}
		else {
			changeClass(obj, firstClass);
		}
	}
}
function changeClassId(id, cName)
{
	obj = document.getElementById(id);
	if( obj )
	{
		changeClass(obj, cName);
	}
}
function fctShow(id)
{
	changeClassId(id, 'show');
}
function fctHide(id)
{
	changeClassId(id, 'hide');
}

function changeChildsOnToOff(id, prefix, objToActivate)
{
	obj = document.getElementById(id);
	if( obj )
	{
		nodes = obj.getElementsByTagName('a');
		if( nodes )
		{
			for(i =0;i<nodes.length;i++)
			{
				if( nodes[i].className.substr(0, prefix.length) == prefix )
				{
					changeClass(nodes[i], prefix+'Off');
				}
			}
		}
	}
	if( objToActivate )
	{
		changeClass(objToActivate, prefix+'On');
	}
}