function clearRegion(n) {
	if (document.getElementById) {				
		var aboutBox = document.getElementById("rlight"+n);
		aboutBox.style.visibility="hidden";
		}
	}


function showRegion(n) {
	if (document.getElementById) {				
		for (i=1;i<=4;i++) {
			var about = document.getElementById("rlight"+i);
			about.style.visibility="hidden";
			}				
		var aboutBox = document.getElementById("rlight"+n);
		aboutBox.style.visibility="visible";
		}
	}
		

function clearHilight(n) {
	if (document.getElementById) {				
		var aboutBox = document.getElementById("hilight"+n);
		aboutBox.style.visibility="hidden";
		}
	}
	
function showHilight(n)	{
	if (document.getElementById) {				
		for (i=1;i<=6;i++) {
			var about = document.getElementById("hilight"+i);
			about.style.visibility="hidden";
			}				
		var aboutBox = document.getElementById("hilight"+n);
		aboutBox.style.visibility="visible";
		}
	}