function switchDisplay(elemId)
{
	elem = document.getElementById(elemId);
	if(elem.style.display=='none')
		elem.style.display='block';
	else
		elem.style.display='none';
}

function switchDisplayHidden(elemId)
{
	elem = document.getElementById(elemId);
	elem.style.display='none';	
}

function switchDisplayShow(elemId)
{
	elem = document.getElementById(elemId);
	elem.style.display='block';
}