function clearTabs() {
			var tab1 = document.getElementById("bodyCO");
			if (tab1) {
				tab1.style.display="none";
			}
			var tab = document.getElementById("tabCO");
			if (tab) {
				tab.className="leftTab";
			}
			var tab2 = document.getElementById("bodyGS");
			if (tab2) {
				tab2.style.display="none";
			}
			var tab = document.getElementById("tabGS");
			if (tab) {
				tab.className="";
			}
			var tab3 = document.getElementById("bodyPL");
			if (tab3) {
				tab3.style.display="none";
			}
			var tab = document.getElementById("tabPL");
			if (tab) {
				tab.className="";
			}
		}
		
		function showCO() {
			clearTabs();
			var tabBody = document.getElementById("bodyCO");
			if (tabBody) {
				tabBody.style.display="block";
			}
			var tab = document.getElementById("tabCO");
			if (tab) {
				tab.className="leftTab current";
			}
			return false;
		}

		function showGS() {
			clearTabs();
			var tabBody = document.getElementById("bodyGS");
			if (tabBody) {
				tabBody.style.display="block";
			}
			var tab = document.getElementById("tabGS");
			if (tab) {
				tab.className="current";
			}
			return false;
		}

		function showPL() {
			clearTabs();
			var tabBody = document.getElementById("bodyPL");
			if (tabBody) {
				tabBody.style.display="block";
			}
			var tab = document.getElementById("tabPL");
			if (tab) {
				tab.className="current";
			}
			return false;
		}