var numMenuItems = 3;
var controlBaseId = "sr_nav_";
var contentBaseId = "sr_page_";

function setToBase()
	{
		for (var i=1; i <= numMenuItems; i++)
		{
			setSingle(i, false);
		}
	}

function setSingle(numOrder, showFlag)
	{
		i0 = controlBaseId + numOrder;
		i1 = contentBaseId + numOrder;
		
		a0	= document.getElementById( i0 );
		a1	= document.getElementById( i1 );
		
		if (showFlag)
		{
			a0.style.display = "none";
			a1.style.display = "block";
		}
		else
		{
			a0.style.display = "block";
			a1.style.display = "none";
		}
		
	}

function selectThis(numOrder)
	{
		setToBase();
		setSingle(numOrder,true);
	}