function show_comment() {
  if (document.getElementById('comment').style.display=='block') {
	document.getElementById('comment').style.display = 'none';
  } else {
	document.getElementById('comment').style.display = 'block';
  }
  return false;
}

function show_question() {
  if (document.getElementById('header_ctr_question').style.display=='block') {
	document.getElementById('header_ctr_question').style.display = 'none';
	document.getElementById('header_ctr1').style.display = 'block';
  } else {
	document.getElementById('header_ctr_question').style.display = 'block';
	document.getElementById('header_ctr1').style.display = 'none';
  }
  return false;
}

function swch(block_id) {
  if (document.getElementById('block'+block_id).style.display=='block') {
	document.getElementById('block'+block_id).style.display = 'none';
	document.getElementById('block'+block_id+'_swch').className = 'none';
  } else {
	document.getElementById('block'+block_id).style.display = 'block';
	document.getElementById('block'+block_id+'_swch').className = 'active';
  }
  return false;
}

function step(step_id) {
  if (document.getElementById('step'+step_id).style.display=='block') {
	document.getElementById('step'+step_id).style.display = 'none';
  } else {
	document.getElementById('step'+step_id).style.display = 'block';
  }
  return false;
}

function step_hide(step_id) {
  if (document.getElementById('step'+step_id).style.display=='block') {
	document.getElementById('step'+step_id).style.display = 'none';
  } else {
	document.getElementById('step'+step_id).style.display = 'block';
  }
  return false;
}