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

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";
}

function getFormParameter(name) {
    var start = window.location.search.indexOf(name+"=");
    var len = start+name.length+1;
    if ((!start) && (name != window.location.search.substring(0,name.length))) return null;
    if (start == -1) return null;
    var end = window.location.search.indexOf("&",len);
    if (end == -1) end = window.location.search.length;
    return unescape(window.location.search.substring(len,end));
}