function navOn(nav){
		 document.getElementById(nav).style.background = "#D26766";
    }
	function navOff(nav){
		 document.getElementById(nav).style.background = "#A34140";
    }
	function textOn(nav){
    }
	function textOff(nav){
    }
	function changePic(picn){
		if(document.images){
			document.images["headpic"].src = "images/h1_2"+ picn + ".jpg";
		}
	}
	function showDesc(ntab){
		document.getElementById(ntab).style.visibility = "visible";
	}
	function hideDesc(ntab){
		document.getElementById(ntab).style.visibility = "hidden";
	}