function getSheetNum() {
  var choice = getCookie("ss");
  choice = parseInt(choice)
  if (!choice) { choice = 0 }
  return choice;
}

function setSheetNum(choice){
  var exp = new Date();
  exp.setFullYear(exp.getFullYear() + 5);
  setCookie("ss", choice, exp);
  location.reload();
}

function setCascade(choice) {
  var specSheet ="";
  if (choice == 1) specSheet = 'soft';
  if (choice == 2) specSheet = 'bright';
  if (choice == 3) specSheet = 'alternat';
  if (specSheet.length != 0) {
     document.write("<link rel='stylesheet' title='Layout' href=");
     document.write("'css/" + specSheet + ".css'");
     document.write(" type='text/css' />"); }
}

function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf(prefix);
  if (begin == -1)
    return null;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}