function showx(target_idx){
	var simplemap = document.getElementById("simplemap");
	var simplemapon = document.getElementById("simplemapon");
	var simplemapoff = document.getElementById("simplemapoff");
	var googlemap = document.getElementById("googlemap");
	var googlemapon = document.getElementById("googlemapon");
	var googlemapoff = document.getElementById("googlemapoff");
		
	var target = document.getElementById(target_idx);
	var targetOn = document.getElementById(target_idx + 'on');
	var targetOff = document.getElementById(target_idx + 'off');
	var sections = [simplemap,googlemap]; 
	var on_images = [simplemapon,googlemapon];
	var off_images = [simplemapoff,googlemapoff];
	
	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';
		} 
}