function setActiveStyleSheet(title) {
  var i, a, main;
// alert ('setActiveStyleSheet() started, title='+title);
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("stylesheet") != -1 && a.getAttribute("title") && a.getAttribute("linkgroup")=='changefontsize') {
       if(a.getAttribute("title") == title) {a.disabled = false; }
	   else {a.disabled=true;}
    }
  }
}

function getActiveStyleSheet() {
// alert ('function getActiveStyleSheet()');
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("stylesheet") != -1 && a.getAttribute("title") && a.getAttribute("linkgroup")=='changefontsize' && !a.disabled) return a.getAttribute("title");
  }
  return null;
}


function createCookie(name,value,days) {
// alert ('function createCookie(), value='+value);
  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) {
 //alert ('function readCookie() started, name='+name);
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  
  var allcookies = document.cookie
  //alert ('function readCookie(): allcookies='+allcookies);
  
  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 setActiveStyleSheet_OnLoad() {
//alert ('setActiveStyleSheet_OnLoad()');
  var cookie = readCookie("ncfontsize");
//alert ('setActiveStyleSheet_OnLoad(). readCookie("ncfontsize") returned '+cookie);    
  var title;
  if (cookie!=null && cookie!="" && cookie!="null") { title=cookie; 
  } else {
  title='style12'
  }
//alert ('setActiveStyleSheet_OnLoad(). will call setActiveStyleSheet, title='+title);  
  setActiveStyleSheet(title);
  return true;
}

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