function alttabson()
{
	document.getElementById("boxtabheader").style.backgroundImage='url("images/boxtabheaderalt.jpg")';
	document.getElementById("content1").style.display="none";
	document.getElementById("content2").style.display="block";
	}
	
function alttabsoff()
{
	document.getElementById("boxtabheader").style.backgroundImage='url("images/boxtabheader.jpg")';
	document.getElementById("content2").style.display="none";
	document.getElementById("content1").style.display="block";	
	}