function toggle(h){
// Is answer showing? Turn it off. Otherwise, Turn everything OFF except selected answer
if(document.getElementById(h).style.display == 'block'){
	for(i=1;i<47;i++){
		if ( document.getElementById(i) != null ) { document.getElementById(i).style.display='none'; }
		}
			}else{
	for(i=1;i<h;i++){
		if ( document.getElementById(i) != null ) { document.getElementById(i).style.display='none'; } 
		}
	for(i=h;i<47;i++){
		if ( document.getElementById(i) != null ) { document.getElementById(i).style.display='none'; } 
		}
		if ( document.getElementById(h) != null ) { document.getElementById(h).style.display='block'; } 
		}	
}