function show_hide() {
  	if(screen.width>1024) {
				if (document.getElementsByName("worldmap_large")[0].style.visibility == "visible") {
					document.getElementsByName("worldmap_large")[0].style.visibility = "hidden";
					return;
				}
				if (document.getElementsByName("worldmap_large")[0].style.visibility == "hidden") {
					document.getElementsByName("worldmap_large")[0].style.visibility = "visible";
					return;
				}
	}
	else{
				if (document.getElementsByName("worldmap_small")[0].style.visibility == "visible") {
					document.getElementsByName("worldmap_small")[0].style.visibility = "hidden";
					return;
				}
				if (document.getElementsByName("worldmap_small")[0].style.visibility == "hidden") {
					document.getElementsByName("worldmap_small")[0].style.visibility = "visible";
					return;
				}
	}
	
}