pars = new Array('topic', 'cp', 'mt', 'act', 'let');
var isOver = 0;
var image_placeholder = new Image();

function sh_div(par)
{
  if(document.getElementById(par).style.visibility == 'visible')
  {
    document.getElementById(par).style.visibility = 'hidden';
    isOver = 0;
  }
  else
  {
    for(i=0; i<pars.length; ++i)
    {
      document.getElementById(pars[i]).style.visibility = 'hidden';
    }
    document.getElementById(par).style.visibility = 'visible';
    isOver = 1;
    setTimeout('setOff()',500);
  }
}

function hide_divs()
{
  if(isOver == 0)
  {
    for(i=0; i<pars.length; ++i)
    {
      if(document.getElementById(pars[i]) != null)
      if(document.getElementById(pars[i]).style.visibility == 'visible')
        document.getElementById(pars[i]).style.visibility= 'hidden';
    }
  }
}

function over_divs(par)
{
  if(document.getElementById(par).style.visibility == 'visible')
    isOver = 1;
}

function out_divs(par)
{
  if(document.getElementById(par).style.visibility == 'visible')
    isOver = 0;
}

function setOff()
{
  isOver = 0;
}

// Funktion fuer Bildwechsel
function set_img(img_name, img_src)
{
  document.images[img_name].src = img_src;
}

// Funktion für Bildladen
function preload_img(img_src)
{
  image_placeholder.src = img_src;
}

// IVW-Pixel aufbauen
function makeIVW(s)
{
  document.write('<img src="http://toi.ivwbox.de/cgi-bin/ivw/' + s + '?r='+escape(document.referrer)+'&d='+Date.parse(new Date())+'" width="1" height="1" align="right">');
  document.write('<img name="rpix" src="http://toi.passul.t-online.de/cgi-bin/' + s + '?r=' + escape(document.referrer) + '&d=' + Date.parse(new Date()) + '" width="1" height="1" align="right" />');
}