// ----------------------------------------------
// StyleSwitcher functions written by Paul Sowden
// http://www.idontsmoke.co.uk/ss/
// - - - - - - - - - - - - - - - - - - - - - - -
// For the details, visit ALA:
// http://www.alistapart.com/stories/alternate/

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;
      if(a.getAttribute("title") == title || a.getAttribute("rel").indexOf("alt") == -1) 
      {
      	a.disabled = false;
      }
    }
  }
}

function getActiveStyleSheet() {
  var i, a, titles = '';
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) titles += a.getAttribute("title")+','; //return a.getAttribute("title");
  }
  if (titles != '') return titles;
  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.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
 // setActiveStyleSheet(title);
  var title2;
var titles = title.split(',');
//setActiveStyleSheet(title);

var i = 0;
for(title2 in titles)
{
  i++;
//  alert(titles[title2]);
	setActiveStyleSheet(titles[title2]);
}
}

window.onunload = function(e) {
//alert('quit page');
  var title = getActiveStyleSheet();
//  alert('123:'+title);
  title = title.substring(0, title.length-1);
//  alert('456:'+title);
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
var title2;
var titles = title.split(',');
//setActiveStyleSheet(title);

var i = 0;
for(title2 in titles)
{
  i++;
//  alert(titles[title2]);
	setActiveStyleSheet(titles[title2]);
}