// arrays

var ids = new Array('purate', 'gas', 'hci', 'hypo');

function switchid(id)
{
	hideallids();
	showdiv(id);
}

function hideallids()
{
	// loop through arrays and hade elements per id
	for (var i=0;i<ids.length;i++)
	{
		hidediv(ids[i]);
	}
}

function hidediv(id)
{
	// safe function to hide an element with a specified id
	if (document.getElementById)
	{
		document.getElementById(id).style.display = 'none';
	}
	else
	{
		if (document.layers)
		{
			document.id.display = 'none';
		}
		else 
		{
			document.all.id.style.display = 'none';
		}
	}
}

function showdiv(id)
{
	if (document.getElementById)
	{
		document.getElementById(id).style.display = 'block';
	}
	else
	{
		if (document.layers)
			{
				document.id.display = 'block';
			}
			else
			{
				document.all.id.style.display = 'block';
			}
	}
}