var expdate = new Date ();
expdate.setTime (expdate.getTime()+(5*365*24*60*60*1000));
function setCookie(name, value, expires, path)
{
 var thisCookie = name + "=" + escape(value) + ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "");
 document.cookie = thisCookie;
}
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;
  if (i == 0) break;
 }
 return null;
}
function delCookie (name,path)
{
 document.cookie = name + "=" + ((path) ? "; path=" + path : "") + "; expires=Thu, 01-Jan-70 00:00:01 GMT";
}