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 var 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;
}

function eraseCookie(name)
{
  createCookie(name,"",-1);
}

function dofontchange(increaseby)
{
  var curfontsize = readCookie("fontsize");
  
  var newsize = eval(curfontsize + increaseby);
  
  createCookie("fontsize",newsize,0);

  document.body.style.fontSize = readCookie("fontsize") + "%";
  
  return false;
}

function initFontsize()
{
  // read the fontsize cookie
  if (readCookie("fontsize") != null)
  {
    document.body.style.fontSize = readCookie("fontsize") + "%";
  }
  else
  {
    createCookie("fontsize",100,0);
  }
  
  return true;
}