function setCookie(cookieName,cookieValue,nDays,domain,path) {
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue)
                 + ";expires="+expire.toGMTString() + ";path="+path+ ";domain="+domain ;
}

function deleteCookie(name) {
  var exp = new Date();  // create a new Date object
  exp.setTime(exp.getTime() - 1);  // set it to yesterday!
  var cval = "";
  document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
 } // end deleteCookie