function clearTabContent() {
	for(var i = 0; i < document.getElementById("tabheaders").childNodes.length; i++) {
		if(document.getElementById("tabheaders").childNodes.item(i).nodeType == 1) document.getElementById("tabheaders").childNodes.item(i).className = "tab";
	}	
	
	for(var i = 0; i < document.getElementById("tabcontent").childNodes.length; i++) {
		if(document.getElementById("tabcontent").childNodes.item(i).nodeType == 1) document.getElementById("tabcontent").childNodes.item(i).style.display = "none";
	}
}

function registerTabEvents() {
/*
		addEvent(document.getElementById("tab1"), "click", function () { clearTabContent(); document.getElementById("tabcontent1").style.display = "block"; document.getElementById("tab1").className = "tab selected first"; }, false);
		addEvent(document.getElementById("tab2"), "click", function () { clearTabContent(); document.getElementById("tabcontent2").style.display = "block";	document.getElementById("tab2").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab3"), "click", function () { clearTabContent(); document.getElementById("tabcontent3").style.display = "block";	document.getElementById("tab3").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab4"), "click", function () { clearTabContent(); document.getElementById("tabcontent4").style.display = "block";	document.getElementById("tab4").className = "tab selected last"; }, false);
*/
		addEvent(document.getElementById("tab1"), "mouseover", function () { clearTabContent(); document.getElementById("tabcontent1").style.display = "block"; document.getElementById("tab1").className = "tab selected first"; }, false);
		addEvent(document.getElementById("tab2"), "mouseover", function () { clearTabContent(); document.getElementById("tabcontent2").style.display = "block";	document.getElementById("tab2").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab3"), "mouseover", function () { clearTabContent(); document.getElementById("tabcontent3").style.display = "block";	document.getElementById("tab3").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab4"), "mouseover", function () { clearTabContent(); document.getElementById("tabcontent4").style.display = "block";	document.getElementById("tab4").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab5"), "mouseover", function () { clearTabContent(); document.getElementById("tabcontent5").style.display = "block";	document.getElementById("tab5").className = "tab selected last"; }, false);

		/*
		addEvent(document.getElementById("tab5"), "click", function () { clearTabContent(); document.getElementById("tabcontent5").style.display = "block";	document.getElementById("tab5").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab6"), "click", function () { clearTabContent(); document.getElementById("tabcontent6").style.display = "block";	document.getElementById("tab6").className = "tab selected"; }, false);
		addEvent(document.getElementById("tab7"), "click", function () { clearTabContent(); document.getElementById("tabcontent7").style.display = "block";	document.getElementById("tab7").className = "tab selected"; }, false);
		*/
}

addEvent(window, "load", registerTabEvents, false);