// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function SPsetCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}
// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function SPgetCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}
// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds
function SPdeleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" + 
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

// default style
var style=1;

//cookie uitlezen voor eventuele andere style en datum cookie verlengen
expireDate = new Date;
expireDate.setMonth(expireDate.getMonth()+6);
styletmp = parseInt(SPgetCookie('tekstgrootte'));
if (!styletmp) style=1; else style=styletmp;

//actieve stylesheet setten
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("stylesheet") != -1 && 
a.getAttribute("title")) {

      a.disabled = true;
      if(a.getAttribute("title") == title) {a.disabled = false; }
    }
  }
}

//stylesheet switchen
function swapStyle(grootte){
	
  var newstylesheet = "tekstgrootte"+grootte;
  setActiveStyleSheet(newstylesheet);
  expireDate = new Date;
  expireDate.setMonth(expireDate.getMonth()+6);
  SPsetCookie('tekstgrootte', grootte, expireDate);
}
setActiveStyleSheet('tekstgrootte'+style);