function answer(question_id,answer) {
  
}


function begin() {
  $('rules').hide(); 
  $('section1').style.display='block';    
  $('section1').focus();
}

function next_section(section_id) {
  
  if ($('section' + section_id)) { 
    $('section' + section_id).style.display='none';
  }
  section_id++;
  $('section' + section_id).style.display='block';
  $('section' + section_id).focus();

}

function previous_section(section_id) {
    
  if ($('section' + section_id)) { 
    $('section' + section_id).style.display='none';
  }
  section_id--;
  $('section' + section_id).style.display='block';
  $('section' + section_id).focus();

}

function finish() {
  
}


function random_int() {
 return Math.floor(Math.random()*100000);
}