var tab = "tab1";

function changeTab() {
	var newtab = arguments[0].parentNode.id;
	if (tab == newtab) return;
	
	var panel = document.getElementById(tab + "-panel");
	var newpanel = document.getElementById(newtab + "-panel");
	
	panel.style.display = "none";
	document.getElementById(tab).className = "none";
	document.getElementById(tab).getElementsByTagName("a")[0].className = "nocurrent";
	newpanel.style.display = "block";
	document.getElementById(newtab).className = "current";
	document.getElementById(newtab).getElementsByTagName("a")[0].className = "current";
	
	tab = newtab;
	newtab = panel = newpanel = null;
}


function changeSTab() {
	var newtab2 = arguments[0].parentNode.id;
	//alert('tab2='+tab2+'and new tab2='+newtab2);
	if (tab2 == newtab2) return;
	var panel2 = document.getElementById(tab2 + "-panel");
	var newpanel2 = document.getElementById(newtab2 + "-panel");
	//alert(newpanel.id);
	panel2.style.display = "none";
	document.getElementById(tab2).className = "";
	document.getElementById(tab2).getElementsByTagName("a")[0].className = "";
	newpanel2.style.display = "block";
	document.getElementById(newtab2).className = "current";
	document.getElementById(newtab2).getElementsByTagName("a")[0].className = "currentS";
	tab2 = newtab2;
	newtab2 = panel2 = newpanel2 = null;
}