function getCookie(name){
var cname = name + "=";               
var dc = document.cookie;             
    if (dc.length > 0) {              
    begin = dc.indexOf(cname);       
        if (begin != -1) {           
        begin += cname.length;       
        end = dc.indexOf(";", begin);
            if (end == -1) end = dc.length;
            return unescape(dc.substring(begin, end));
        } 
    }
return null;
}

  var today = new Date();
  var expiry = new Date(today.getTime() + 28 * 24 * 60 * 60 * 1000); // plus 28 days
  var expired = new Date(today.getTime() - 28 * 24 * 60 * 60 * 1000); // less 28 days


// Use this function to save a cookie.
function setCookie(name, value, expires) {
//document.cookie = name + "=" + escape(value) + "; path=/" +
document.cookie = name + "=" + escape(value) + "; expires=" + expiry.toGMTString();
}

// Use this function to delete a cookie.
function delCookie(name) {
document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT" +  "; path=/";
}