doMobileRedirect('http://m.panerabread.com', 10000, 'mobile');

// simple consoldated alert method for debugging
function debug(string) {
    //alert(string);
}

// write a cookie
// name:    the name of the cookie to set
// value:   the value to set
// expires: how long the cookie lasts, in minutes
// path:    the site path for which the cookie is valid
// domain:  the domain for which the cookie will be set
function setCookie(name, value, expires, path, domain) {
    var expiresDate = null;

    //debug(expires);
    // if it's not null, set it.  if it's null it will be a session cookie
    if (expires && expires != "0") {
        // turn it into milliseconds
        //expires = expires * 60 * 60 * 1000;
        expires = expires * 60 * 1000;
        expiresDate = new Date().getTime() + expires;
    }


    var cookie;
    // if name is not set it won't work anyway, so we don't need to check
    cookie = name + "=" + value;
    cookie += ((expires && expires != 0) ? ";expires=" + new Date(expiresDate).toGMTString() : "");
    cookie += ((path) ? ";path=" + path : "");
    cookie += ((domain) ? ";domain=" + domain : "");

    document.cookie = cookie;
}

function trim(str) { return str.replace(/^\s+|\s+$/, ''); };
// get the value of a cookie
// name:  the name of the cookie for which you want the value
function getCookie(name) {
    var cookie = null;
    var cookies = document.cookie.split(";");
    for (var i = 0; i < cookies.length; i++) {
        var cookie = cookies[i];
        var cookieval = cookie.split("=");
        if (trim(cookieval[0].toLowerCase()) == trim(name.toLowerCase())) return true;
    }

    return false;
}

// get the value of a query parameter
// name:  the name of the query parameter for which you want the value
function getQueryParam(name) {
    var value;
    var queryString = window.top.location.search.substring(1);
    var queryParam = name + "=";

    if (queryString.length > 0) {
        var beginParam = queryString.indexOf(queryParam);

        if (beginParam != -1) {
            beginParam += queryParam.length;
            var endParam = queryString.indexOf("&", beginParam);

            if (endParam == -1) {
                endParam = queryString.length;
            }
            value = queryString.substring(beginParam, endParam);
        }
    }
    return typeof value != 'undefined';
}

// determine whether the device is a mobile device or not
function isMobile() {
    var agent = navigator.userAgent;
    var accept = navigator.accept;
    //var agent = 'Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10';
    //var agent = 'Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543a Safari/419.3'

    // Checks the user-agent
    if (agent != null) {
        // Checks if its a Windows browser but not a Windows Mobile browser
        if (agent.indexOf("windows") != -1
                && agent.indexOf("windows ce") == -1) {
            return false;
        }

        // Some common patterns to tell if it is a mobile browser
        var mobileBrowserPattern = /up.browser|up.link|windows ce|iphone|iemobile|mini|mmp|symbian|midp|wap|phone|pocket|mobile|pda|psp/ig;
        var mobileBrowserRegex = new RegExp(mobileBrowserPattern);

        if (mobileBrowserRegex.test(agent) && agent.match(/iPad/gi) == null) {
            return true;
        }

        // bunch of mobile useragent strings
        var userAgents = ["acs-", "alav", "alca", "amoi",
            "audi", "aste", "avan", "benq",
            "bird", "blac", "blaz", "brew",
            "cell", "cldc", "cmd-", "dang",
            "doco", "ef81", "eric", "hipt", "inno",
            "ipaq", "java", "jigs", "kddi",
            "keji", "leno", "lg-c", "lg-d",
            "lg-g", "lge-", "maui", "maxo",
            "midp", "mits", "mmef", "mobi",
            "mot-", "moto", "mwbp", "nec-",
            "newt", "noki", "opwv", "palm",
            "pana", "pant", "pdxg", "phil",
            "play", "pluc", "port", "pre:", "prox",
            "qtek", "qwap", "sage", "sams",
            "sany", "sch-", "sec-", "send",
            "seri", "sgh-", "shar", "sie-",
            "siem", "smal", "smar", "sony",
            "sph-", "symb", "t-mo", "teli",
            "tim-", "tosh", "tsm-", "upg1",
            "upsi", "vk-v", "voda", "w3c ",
            "wap-", "wapa", "wapi", "wapp",
            "wapr", "webc", "winw", "winw", "wurf",
            "xda", "xda-"];

        // look for the possible user agents of mobile browsers
        for (var i = 0; i < userAgents.length; i++) {
            if ((userAgents[i] == agent.substring(0, 3) || agent.match(/webos/gi)) && (!agent.match(/iPad/gi))) {
                return true;
            }
        }

        // Checks the accept header for wap.wml or wap.xhtml support
        if (accept != null) {
            if (accept.indexOf("text/vnd.wap.wml") != -1
                    || accept.indexOf("application/vnd.wap.xhtml+xml") != -1) {
                return true;
            }
        }
    }

    // otherwise, not mobile
    return false;
}
// redirect the browser to a URL if it is determined it is a mobile device
// url:     the URL to which the browser will be redirected
// timeout: the number of hours the redirect cookie will exist; if it is 0 it will be considered a session cookie
function doMobileRedirect(url, timeout, cookieVariableName) {
    var redirect = true;

    debug('getCookie: ' + getCookie(cookieVariableName) + '\ngetQueryParam: ' + getQueryParam(cookieVariableName) + '\nisMobile: ' + isMobile())
    if (getCookie(cookieVariableName)) {
        debug("We found the '" + cookieVariableName + "' cookie, not redirecting");
        return;
    }
    else if (getQueryParam(cookieVariableName)) {
        setCookie(cookieVariableName, "no", timeout, "/", ".markertek.com");
        return;
    }
    else if (isMobile()) {
        window.location = url;
    }
}