function showTab (id) {
	var objTab = document.getElementById("tab").getElementsByTagName("LI");
	document.getElementById("tab").className = "tab" + id;
	objTab[0].className = "";
	objTab[1].className = "";
	objTab[2].className = "";
	objTab[id].className = "selected";
	conid = "Content" + id;
	showContent(conid);
}
function showContent (id) {
	document.getElementById("Content0").style.display = "none";
	document.getElementById("Content1").style.display = "none";
	document.getElementById("Content2").style.display = "none";
	document.getElementById(id).style.display = "block";
}