function linkOn(currentLink, cell) {
			currentLink.style.color = "#778899";
			currentLink.style.fontWeight= "bold";
			currentLink.style.textDecoration= "none";
			
			var currentCell = document.getElementById(cell);
			currentCell.style.backgroundColor = "#B0C4DE";
		}
		
		function linkOff(currentLink, cell) {
			currentLink.style.color = "#F0F8FF";
			currentLink.style.fontWeight= "bold";
			currentLink.style.textDecoration= "none";
			
			var currentCell = document.getElementById(cell);
			currentCell.style.backgroundColor = "#778899";
		}
		function showLayer(layerid){
			var layer = document.getElementById(layerid);
			layer.style.visibility = "visible";
		}
		function hideLayer(layerid){
			var layer = document.getElementById(layerid);
			layer.style.visibility = "hidden";
		}