function setFontSize(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;
    }
  }
}

function setActiveStyleSheet(title) {    
      /*     
     * This method was rewritten to provide a fix for Safari 5.1,    
     * because of a bug in this browser that does not process "a.disabled = false"    
     */   
      var a;   
      var link;    
     var href = '';    
     for (var i = 0; (a = document.getElementsByTagName("link")[i]); i++) {
         // If this object is the link element that will hold the link to the enabled stylesheet, store the reference        
          if (a.getAttribute("title") == "switch")            
               link = a;         
          if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {           
                if (a.getAttribute("title") == title) {                
                    href = a.href;            
                    }        
               }    
          }   
           // Set href attribute of the link element    
          link.setAttribute("href", href);
}

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();
  setFontSize(title);
}

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

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