function display_ex(id, idx) {
  if (document.getElementById){
	if (document.getElementById(id+idx)) {
	  j = 1;
	  while (document.getElementById(id + j)) {
		if (document.getElementById(id + j).style.display != 'block')
			Effect.BlindUp(id+j, {queue:'end', duration: 0.0});
	 		Effect.BlindUp(id+j+1, {queue:'end', duration: 0.0});
	  		Effect.BlindUp(id+j+1+1, {queue:'end', duration: 0.0});
	  		Effect.BlindUp(id+j+1+1+1, {queue:'end', duration: 0.1});
		j++;
	  }
	  //document.getElementById(id + idx).style.display = 'block';
      Effect.BlindDown(id+idx, {queue:'end', duration: 0.0});
	  Effect.BlindDown(id+idx+1, {queue:'end', duration: 0.0});
	  Effect.BlindDown(id+idx+1+1, {queue:'end', duration: 0.0});
	  Effect.BlindDown(id+idx+1+1+1, {queue:'end', duration: 0.1});
	}
  }
}