function setFontStyle(stl) {
    if (stl == "normal") {
        document.getElementById("lnkFontStyle").href = "/site/css/chl_main.css";
        if (document.getElementById("aFntLarge") && document.getElementById("aFntNormal")) {
            document.getElementById("aFntNormal").style.display = 'none';
         document.getElementById("aFntLarge").style.display = '';
        }
        
    }
    else {
        document.getElementById("lnkFontStyle").href = "/site/css/chl_main_large.css";
        if (document.getElementById("aFntLarge") && document.getElementById("aFntNormal")) {
            document.getElementById("aFntLarge").style.display = 'none';
            document.getElementById("aFntNormal").style.display = '';
        }
    }
    createCookie("fontStyle", stl, "100")
}

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;
    }
  }
}

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;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}
function setPageLayout() {
    var f_cookie = readCookie("fontStyle");
    var fontStyle = f_cookie ? f_cookie : "/site/css/chl_main.css";
    setFontStyle(fontStyle);
    if (screen.width > 1000) {
        document.getElementById("lnkWidth").href = "/site/css/StyleSheet_1000.css";
    }
    else {
        document.getElementById("lnkWidth").href = "/site/css/StyleSheet_800.css";
    }
}