function HideElement(id)
{
	element = document.getElementById(id);
	element.style.visibility = 'hidden';
	element.style.display = 'none';
}

function ShowElement(id)
{
	element = document.getElementById(id);
	element.style.visibility = 'visible';
	element.style.display = 'inline';
}

function ToggleVisibility(id)
{
	element = document.getElementById(id);
	if(element.style.visibility == 'visible')
	{
		HideElement(id);
	}	
	else
	{
		ShowElement(id);
	}
}