function tableRowAlts() {
				var chart = document.getElementById("chart");
				var trs = chart.getElementsByTagName("tr");
				for (var i = 1; i < trs.length; i += 2) {
					var tds = trs[i].getElementsByTagName("td");
					for (var j = 0; j < tds.length; j++) {
						tds[j].style.backgroundColor = "#eeeff3";
					}
				}
			}