function setNav(elm)	{
		var obj = document.getElementById(elm);
		obj.className = "selectedBg";
	}
	
function setNav2(elm)	{
		var obj = document.getElementById(elm);
		obj.className = "selectedNoBg";
	}
	
function setNav3(elm)	{
		var obj = document.getElementById(elm);
		obj.className = "active";
	}