//ACHTERGROND KLEUR AANPASSEN
function changeBackground(object, color)
{
  object.style.backgroundColor = color;
}

//BROWSER CHECK
function detect(filename)
{
  if(/MSIE (\d+\.\d+);/.test(navigator.userAgent))
  { 
   var ieversion = new Number(RegExp.$1);
   
   if(ieversion >= 8)
   {
    loadCSS('css/' + filename);
   }
   else if(ieversion >= 7)
   {
    loadCSS('css/ie7/' + filename);
   }
   else if(ieversion >= 6)
   {
    loadCSS('css/ie6/' + filename);
   }
  }
  else
  {
   loadCSS('css/' + filename);
  }
}

//LADEN VAN CSS
function loadCSS(filename)
{
  var fileref=document.createElement("link");
  fileref.setAttribute("rel", "stylesheet");
  fileref.setAttribute("type", "text/css");
  fileref.setAttribute("href", filename);
  document.getElementsByTagName("head")[0].appendChild(fileref);
}


//IMAGE SWITCHEN
function changeImage(object, img)
{
  if(object.nodeName == 'INPUT')
  {
    object.style.background = 'url(' + img + ')';
    object.style.backgroundRepeat = 'no-repeat';
  }
  else if(object.nodeName == 'IMG')
  {
    object.src = img;
  }
}

//MELDING MET VRAAG
function chooseBox(string, url)
{
	var doIt = confirm(string);
	if(doIt)	
	{
    document.location.href = url ; 
  }
}


//GROTER MAKEN VAN DIV
function resize(id, oh, th)
{
  var div = document.getElementById('open' + id).style;
  
  if(div.overflow == 'hidden')
  {
    div.height = 'auto';
    div.overflow = 'visible';
  }
  else
  {
    div.height = '42px';
    div.overflow = 'hidden';
  }
}

//HELP TEKSTEN WEERGEVEN
function help_display(id)
{
    var handle = document.getElementById("help_handle" + id);
    var tekst = document.getElementById("help_tekst" + id);
    
    if(tekst.style.display === "" || tekst.style.display === "none")
    {
      tekst.style.display = "block";
    }
    else if(tekst.style.display == "block")
    {
      tekst.style.display = "none";
    }
} 

//INPUT TEXT WEERGEVEN EN VERWIJDEREN
function changeText(object, string, orig)
{
  if(orig == object.value)
  {
    object.value = string;
  }

  if(object.value === '')
  {
    object.value = string;
  }
}

function opendiv(id)
{
  var object = document.getElementById(id);
  
  if(object.style.display === "" || object.style.display === "none")
  {
    object.style.display = "block";
  }
  else if(object.style.display == "block")
  {
    object.style.display = "none";
  }
}