function setActiveStyleSheet(title) {
  var i, a, main, f;
  f = false;
  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) 
      if(a.getAttribute("href").indexOf(title)!= -1) 
      {
        a.disabled = false;
        f = true;
        //alert(title);
      }
    }
  }
  if (f == false)
    setActiveStyleSheet("large-");
}

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) 
    {
        //alert(a.getAttribute("href"));
        return getStyleSheetName(a.getAttribute("href"));
    }
  }
  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 getStyleSheetName(a.getAttribute("href"));
  }
  return null;
}

function getStyleSheetName(fullhref) 
{
    var i, name;
    //alert(fullhref);
    i = fullhref.indexOf("-");
    //alert(i);
    name = fullhref.substring(i+1, fullhref.length);
    
    i = name.indexOf("-");
    name = name.substring(0, i+1);
    //alert(name);
    return name;
}


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();
  //alert(title);
  setActiveStyleSheet(title);
}

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

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