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;
	  setActiveIcon(title);
    }
  }
}

function setActiveStyleSheetColor(color) {
	var i, a, main;
	for (i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    	if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("color")) {
			a.disabled = true;
			if (a.getAttribute("color") == color) a.disabled = false;
	    }
	}
	
	var linksArr = [];
	linksArr['kleur'] 		= document.getElementById('kleur');
	linksArr['zwartwit']	= document.getElementById('zwartwit');
	
	for (key in linksArr) {
		if (typeof linksArr[key] == "object") {
			if (key == color)
				linksArr[key].style.fontWeight = 'bold';
			else
				linksArr[key].style.fontWeight = 'normal';
		}
	}
	
}

function setActiveIcon(title) {
	var linksArr = [];
	linksArr['normal'] 	= document.getElementById('link_normal');
	linksArr['medium']	= document.getElementById('link_medium');
	linksArr['large'] 	= document.getElementById('link_large');
	
	if (typeof linksArr == "object") {
		for (key in linksArr) {
			if (typeof linksArr[key] == "object") {
				if (key == title)
					linksArr[key].style.color = '#f79234';
				else
					linksArr[key].style.color = '#333';
			}
		}
	}
}

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

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