function showx(target_idx){
	var volunteerreg = document.getElementById("volunteerreg");
	var outsidenm = document.getElementById("outsidenm");
	var directions = document.getElementById("directions");
	var hotel = document.getElementById("hotel");
	var whattoexpect = document.getElementById("whattoexpect");
	var equipment = document.getElementById("equipment");
	var whatdentistbring = document.getElementById("whatdentistbring");
	var protocol = document.getElementById("protocol");
	var protocol2 = document.getElementById("protocol2");
	var protocol3 = document.getElementById("protocol3");
	var protocol4 = document.getElementById("protocol4");
	var faq = document.getElementById("faq");
//	var x50thanniv4 = document.getElementById("x50thanniv4");
//	var x50thanniv4on = document.getElementById("x50thanniv4on");
//	var x50thanniv4off = document.getElementById("x50thanniv4off");
		
	var target = document.getElementById(target_idx);
//	var targetOn = document.getElementById(target_idx + 'on');
//	var targetOff = document.getElementById(target_idx + 'off');
	var sections = [volunteerreg,outsidenm,directions,hotel,whattoexpect,equipment,whatdentistbring,protocol,protocol2,protocol3,protocol4,faq]; 
//	var on_images = [x50thanniv1on,x50thanniv2on,x50thanniv3on,x50thanniv4on];
//	var off_images = [x50thanniv1off,x50thanniv2off,x50thanniv3off,x50thanniv4off];
	
	for(var i = 0; i < sections.length; i++){
		if(sections[i] != target){
			sections[i].style.display = 'none';
//			on_images[i].style.display = 'none';
//			off_images[i].style.display = 'block';
		}
	}
	if (target.style.display == 'none') {
		target.style.display = 'block';
//		targetOn.style.display = 'block';
//		targetOff.style.display = 'none';
		} 
}