function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+ ";";
((expiredays==null) ? "" : "expires="+exdate.toGMTString()) + ' path=/';

}

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  }
  else begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}
//function delCookie(name){
// expires = new Date(1970,1,1);
// expires = expires.toGMTString();
// deCookie = name
// deCookie += "=delete; expires=";
// deCookie += expires;
// document.cookie = deCookie;
//}

function delCookie(name) {
document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT" + "; path=/";
} 

function checkit(name, chval){
var check=(getCookie(name));
  if (check== chval ){
  	
//document.getElementById('opening').style.visibility='hidden';
//alert('Het formulier is verzonden. U ontvangt de gevraagde informatie zo spoedig mogelijk');
}
//delCookie('sent')
}