function showTab(n)
{
	var e = null;
	var bActive = (n != null);
	
	for (i=0;i<3;i++)
	{
		// left tabs
		e = document.getElementById("t"+i);
		//e.className = ("tab " + ((i==n & bActive) ? "active" : ("page"+i)));
		//e.className = bActive ? ("tab " + ((i!=n) ? "in" : "") + "active") : ("page"+i);
		e.className = bActive ? ("tab " + ((i==n) ? "active" : ("page"+i+"x"))) : ("page"+i);
		e = document.getElementById("t"+i+"i"); // img
		//e.src = ("t"+i+"f"+((i==n & bActive) ? "a" : "")+".gif");

		// right tabs
		e = document.getElementById("p"+i);
		e.style.display = bActive ? "none" : "block";

		// page content
		e = document.getElementById("c"+i);
		e.style.display = (i==n) ? "block" : "none";
		e.className = ("section " + ((i==n & bActive) ? "active" : ""));
	}
}