function toggleDivs(elementOn, elementOff){
      document.getElementById(elementOn).style.display = 'block';
      document.getElementById(elementOff).style.display = 'none';
}

function toggleDiv(element){
      if(document.getElementById(element).style.display = 'none')
      {
        document.getElementById(element).style.display = 'block';
      }
      else if(document.getElementById(element).style.display = 'block')
      {
        document.getElementById(element).style.display = 'none';
      }
}