function ReplacePhoneImageIfAffiliate(imageName, affilateImageURL, domainName) {
    var searchString = window.location.search.substring(1);
    var Parameters = new Object();
    var nameValuePairs = searchString.split(/&/);
    var nameValuePair;
    var name;
    var value;

    for (var i = 0; i < nameValuePairs.length; i++) {
        nameValuePair = nameValuePairs[i].split(/=/);


        name = nameValuePair[0];
        value = nameValuePair[1];

        name = name.toLowerCase();

        if (name == "adnetwork") {
            if (typeof (value) != "undefined") {
                value = value.toLowerCase();

                if (value == "af") {

                    //*********set cookie******************//
                    pathname = '/';
                    //myDomain = '.yoursite.com';
                    //pathname.substring(0,pathname.lastIndexOf('/')) +'/';
                    // set expiry date to 30 days from now.
                    var largeExpDate = new Date();
                    largeExpDate.setTime(largeExpDate.getTime() + (30 * 24 * 3600 * 1000));
                    SetCookie(name, value, largeExpDate, pathname, "." + domainName);
                    //*********set cookie******************//  

                }
            }
        }
    }

    if (GetCookie("adnetwork") == "af") {
        setImage(imageName, affilateImageURL)
    }
}

function SetCookie(name, value) {
    var argv = SetCookie.arguments;
    var argc = SetCookie.arguments.length;
    var expires = (argc > 2) ? argv[2] : null;
    var path = (argc > 3) ? argv[3] : null;
    var domain = (argc > 4) ? argv[4] : null;
    var secure = (argc > 5) ? argv[5] : false;
    document.cookie = name + "=" + escape(value) +
                ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
                ((path == null) ? "" : ("; path=" + path)) +
                ((domain == null) ? "" : ("; domain=" + domain)) +
                ((secure == true) ? "; secure" : "");
}

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 setImage(imgName, newImgSrc) {
    var temp;
    temp = "document.images." + imgName + ".src = '" + newImgSrc + "'";
    eval(temp);
}