function showx(target_idx){
	var whoshouldcome = document.getElementById("whoshouldcome");
	var directions = document.getElementById("directions");
	var whattobring = document.getElementById("whattobring");
//	var x50thanniv3on = document.getElementById("x50thanniv3on");
//	var x50thanniv3off = document.getElementById("x50thanniv3off");
//	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 = [whoshouldcome,directions,whattobring]; 
//	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';
		} 
}