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 SetCookie(name, value) {
    var expdate = new Date();
    var argv = SetCookie.arguments;
    var argc = SetCookie.arguments.length;
    //var expires = (argc > 2) ? argv[2] : null;
    var expires = (argc > 3) ? argv[3] : null;
    //var path = (argc > 3) ? argv[3] : null;
    var path = (argc > 2) ? argv[2] : "/";
    var domain = (argc > 4) ? argv[4] : null;
    var secure = (argc > 5) ? argv[5] : false;
    if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));
    document.cookie = name + "=" + escape (value) +
        ((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))+
        ((path == null) ? "" : ("; path=" + path)) +
        ((domain == null) ? "" : ("; domain=" + domain))+
        ((secure == true) ? "; secure" : "");
}
function DelCookie(name) {
    var exp = new Date();
    exp.setTime (exp.getTime() - 1);
    var cval = GetCookie (name);
    document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();
}

function GotoEmetrix(id, q) {
    SetCookie("cookie_mypage", location.href);
//http://secure.emetrix.com/order/addtocart.asp?PID=133297018&Q=1
    location.href = "http://secure.emetrix.com/order/addtocart.asp?PID=" + id + "&Q=" + q;
}

function GotoMyPage() {
    var mypage = GetCookie("cookie_mypage");
    if ((mypage != null) && (mypage != "")) {
        SetCookie("cookie_mypage", "");
        location.href = mypage;
    }
}

GotoMyPage();