function setCookie(name, value) {
  var today = new Date();
  var oneYear = (1000 * 60 * 60 * 24 * 365);
  var expDate = new Date(today.getTime() + oneYear);
  document.cookie=name + "=" + escape(value) + "; expires=" + expDate.toGMTString();
}

function getCookie(name) {
  var cookies = document.cookie.split("; ");
  var cookieValue = " ";
  for (var i = 0; i < cookies.length; i++) {
    values = cookies[i].split("=");
    if (values[0] == name)
    {
      cookieValue = unescape(values[1]);
    }
  }

  return cookieValue;
}

function deleteCookie(name) {
  var today = new Date();
  var expDate = new Date(today.getTime() - 1);
  document.cookie=name + "=; expires=" + expDate.toGMTString();
}

function changeStyleSheetText(id, op)
{
  if (getCookie("sizetext") != " ")
  {
    LongTxt = parseFloat(getCookie("sizetext"));
  }

  if (((LongTxt >= 0.6) && (op == -1)) || (op == 1))
  {
    document.getElementById(id).style.fontSize = LongTxt + (op * Increment) + 'em';
    LongTxt += (op * Increment);
    setCookie("sizetext", LongTxt);
  }

  if (op == 0)
  {
    document.getElementById(id).style.fontSize = LongDefault + 'em';
    LongTxt = LongDefault;
    setCookie("sizetext", LongTxt);
  }
}

var LongDefault = 0.8;
var LongTxt = 0.8;
var Increment = 0.15;