//http://www.alistapart.com/articles/alternate/
//modified by nathan jahnke <njahnke@mac.com> and joe kohlmann <kohlmannj@mac.com>

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;
    }
  }
  windowOnUnload();
}

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;
}

function deleteCookie(name) {
	document.cookie = name+"=value;expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/";
	alert("Cookie cleared. Please restart your browser.");
}

window.onLoad = windowOnLoad();

function windowOnLoad() {
	var cookie = readCookie("m2k2style2");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

window.onUnload = windowOnUnload();

function windowOnUnload() {
	var title = getActiveStyleSheet();
	createCookie("m2k2style2", title, 365);
}

function goTopic(form) {
        Topic = (form.m2k2style.options[form.m2k2style.selectedIndex].value);
        if ( Topic != "x" )
		setActiveStyleSheet(Topic);
}

function goLanguage(form) {
        Topic = (form.m2k2language.options[form.m2k2language.selectedIndex].value);
        if ( Topic != "x" )
		document.location.href=Topic;
}

function restoreDefault(form) {
	var cookie = readCookie("m2k2style2");
	var title = cookie ? cookie : getPreferredStyleSheet();
	for (var q = 0; q < form.options.length; q++) {
		if (form.options[q].value == title) {
			form.options[q].selected=true
		}
	}
}

var cookie = readCookie("m2k2style2");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);