/** cookies helper in js */

function getCookieVal(offset) {
   var endstr = document.cookie.indexOf(";", offset);
   if(endstr == -1) { endstr = document.cookie.length; }
   return unescape(document.cookie.substring(offset, endstr));
}

function getCookie(name) {
  var arg  = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while(i < clen) {
     var j = i + alen;
     if(document.cookie.substring(i,j) == arg) {
           return getCookieVal(j);
     }
     i = document.cookie.indexOf(" ",i)+1;
     /*i++;*/
     if(i==0) break;
  }
  return null;
}

function deleteCookie(name, path, domain) {

   if(getCookie(name)) {
       document.cookie = name + "=" +
          ((path)? "; path="+ path : "") +
          ((domain)? "; domain="+ domain : "") +
          ("; expires=Thu, 01-Jan-70 00:00:01 GMT");
   }
}

function setCookie(name, value, expires, path, domain, secure) {

  document.cookie = name + "=" + escape(value) +
       ((expires)? "; expires="+ expires.toGMTString() : "") +
       ((path)? "; path="+ path : "") +
       ((domain)? "; domain="+ domain : "") +
       ((secure)? "; secure="+ secure : "");

}