function getCookie(c_name) {
  if (document.cookie.length>0) {
    c_start=document.cookie.indexOf(c_name + "=");
    if (c_start!=-1) { 
      c_start=c_start + c_name.length+1; 
      c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
      return unescape(document.cookie.substring(c_start,c_end));
    } 
  }
return "";
}

function setCookie(c_name,value) {
  document.cookie=c_name+ "=" +escape(value)+ ";path=/";
  checkCookie();
}

function checkCookie() {
  fontsize = getCookie('nff_fontsize');
  document.getElementById('main').style.fontSize = fontsize + 'em';
}