function toggleLayer(whichLayer){
if (document.getElementById)
{
var style2 = document.getElementById(whichLayer).style;
style2.display = style2.display? "":"block";
}
else if (document.all)
{
var style2 = document.all[whichLayer].style;
style2.display = style2.display? "":"block";
}
else if (document.layers)
{
var style2 = document.layers[whichLayer].style;
style2.display = style2.display? "":"block";
}
}

function toggleImage(whichImage){
if (document.getElementById)
{
var img2 = document.getElementById(whichImage).src;
img2 = img2? "http://cms.seuren.nl/img/icon_dubbel-down.gif":"http://cms.seuren.nl/img/icon_dubbel-up.gif";
}
else if (document.all)
{
var img2 = document.all[whichImage].style;
img2.display = img2.display? "":"block";
}
else if (document.layers)
{
var img2 = document.layers[whichImage].style;
img2.display = img2.display? "":"block";
}
}

  function ToggleDisplay(id)
  {
    var elem = document.getElementById(id);
    if (elem)
    {
      if (elem.style.display != 'block')
      {
        elem.style.display = 'block';
        elem.style.visibility = 'visible';
      } 
      else
      {
        elem.style.display = 'none';
        elem.style.visibility = 'hidden';
      }
    }
  }


function toggle(divID) {
var oDiv = document.getElementById(divID);
if (oDiv.style.display == "none")
expand(divID);
else
collapse(divID);
}

function expand(divID) {

var oDiv = document.getElementById(divID);
oDiv.style.display = "block";
}

function collapse(divID) {

var oDiv = document.getElementById(divID);
oDiv.style.display = "none";
}

  function showHideContent(id, show)
  {
    var elem = document.getElementById(id);
    if (elem) 
    {
      if (show) 
      {
        elem.style.display = 'block';
        elem.style.visibility = 'visible';
      } 
      else
      {
        elem.style.display = 'none';
        elem.style.visibility = 'hidden';
      }
    }
  }