function displayTools(){
	
	if(navigator.cookieEnabled && document.styleSheets){
		document.write(
		"<a class=\"font_normaal\" href=\"#\" onclick=\"setActiveStyleSheet('normaal'); return false;\">A</a> " +
		"<a class=\"font_groter\" href=\"#\" onclick=\"setActiveStyleSheet('groter'); return false;\">A</a> " +
		"<a class=\"font_groot\" href=\"#\" onclick=\"setActiveStyleSheet('grootst'); return false;\">A</a>"		
		);
	}else{
		/* if their browser supports JavaScript but not some of the functions or cookies are disabled then you can output alternative content here.*/
		document.write('');
	}
}	
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

var oldStyleswitchOnload = window.onload;
if (typeof window.onload != "function") {
	window.onload = function(e) {
	  var cookie = readCookie("style");
	  var title = cookie ? cookie : getPreferredStyleSheet();
	  setActiveStyleSheet(title);
	}
} else {
	window.onload = function(e) {
	  oldStyleswitchOnload();
	  var cookie = readCookie("style");
	  var title = cookie ? cookie : getPreferredStyleSheet();
	  setActiveStyleSheet(title);
	}
}


window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);