function announcements(){
        slidedown('announcements'); 
		slideup('news'); 
		slideup('events'); 
		slideup('voice'); 
}
function news(){
        slideup('announcements'); 
		slidedown('news'); 
		slideup('events'); 
		slideup('voice'); 
}
function events(){
        slideup('announcements'); 
		slideup('news'); 
		slidedown('events'); 
		slideup('voice'); 
}
function voice(){
        slideup('announcements'); 
		slideup('news'); 
		slideup('events'); 
		slidedown('voice'); 
}