function write_captcha(num1, operator, num2)
{
  document.write(num1 + " " + operator + " " + num2 + " =");
}

function open_pic(id)
{
  fenster = window.open(url + "?sec=gal_pic;id=" + id,"galerie" , "width=750,height=750,scrollbars=yes");
}

function showhide_div(id)
{
  div = document.getElementById(id)
  
  if(div)
  {  
    if(div.style.display == 'none')
      div.style.display = 'block';
    else if(div.style.display == 'block')
      div.style.display = 'none';
    else
      div.style.display = 'block';
  }
}