var previoustab="";
	var previousannouncement="latestAnnouncement";
	
	function showAnnouncement(did, trobject){
		highlighttab(trobject);
		if (document.getElementById){
			if (previousannouncement!="") 
				document.getElementById(previousannouncement).style.display="none";
			document.getElementById(did).style.display="block";
			previousannouncement=did;
		}
	}
	
	function highlighttab(trobject){
		if (typeof tabobjlinks=="undefined") 
			tabobjlinks=collecttablinks();
		for (i=0; i<tabobjlinks.length; i++) 
			tabobjlinks[i].className="";
		trobject.className="current";				
		
	}
	
	function collecttablinks(){
		var tabobj=document.getElementById("recentAnnouncements");
		tabobjlinks=tabobj.getElementsByTagName("tr");
		return tabobjlinks;
		}
	
	function do_onload(){
		showAnnouncement('latestAnnouncement', this);
		document.getElementById("latestAnnouncementLink").className="current";
		}
	
	if (window.addEventListener)
		window.addEventListener("load", do_onload, false);
	else if (window.attachEvent)
		window.attachEvent("onload", do_onload);
	else if (document.getElementById)
		window.onload=do_onload;