<!--
function switchTab(tabOn){
			var elements;
			elements = document.getElementsByTagName('tr');
			for(var i = 0; i < elements.length; i++){
				current = elements[i];
				if (current.attributes.length > 1) {
					period = current.attributes[1].nodeValue;
					if (period == tabOn) {
						current.style.display = "";
					} else {
						current.style.display = "none"
					}
				}
			}
			table = document.getElementById("linesTable");
			return false;
		}
-->