var expFactor = 1000 * 60 * 60 * 1 // 1h

/*
var expDate = new Date();
expDate.setTime(expDate.getTime() + expFactor);
*/

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) {	//while open
      var j = i + alen;
      if (document.cookie.substring(i, j) == arg)
         return getCookieVal (j);
      i = document.cookie.indexOf(" ", i) + 1;
      if (i == 0) break; 
   }	//while close
   return null;
}

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" : "");
} 


function DelCookie (name, path, domain) {
	if (GetCookie(name)) document.cookie = name + "=" +
        ( (path) ? ";path=" + path : "") +
        ( (domain) ? ";domain=" + domain : "") +
        ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}