var expdate= new Date();

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

function Cookie (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 setCookie (name,value,expires,path,domain,secure) {
 expdate.setTime(expdate.getTime() + (24*60*60*1000*365));
 document.cookie = name + "=" + escape (value) +
 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 ((path) ? "; path=" + path : "") +
 ((domain) ? "; domain=" + domain : "") +
 ((secure) ? "; secure" : "");
}

function deleteCookie(name) { 
 expdate = new Date(); 
 expdate.setTime(expdate.getTime() - (86400 * 1000 * 1)); 
 setCookie(name, "", expdate); 
}