JS - Mobile redirect

gistfile1.txt

function mobile_redirect() {
    var path = window.location.pathname;
    if (path != null) {
        window.location = 'http://host' + path
    } else {
        window.location = 'http://host/'
    }
}
function setCookie(c_name, value, expiredays) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";path=/;expires=" + exdate.toUTCString())
}
function getCookie(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1;
            c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end))
        }
    }
    return ""
}
function gup(name) {
    name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(window.location.href);
    if (results == null) return "";
    else return results[1]
}
var mobile_fullsite = gup('fullsite');
if (mobile_fullsite == 'true') {
    setCookie('mobile_fullsite', '1', '365')
}
var mobile_cookie = getCookie('mobile_fullsite');
if (mobile_cookie == null || mobile_cookie == "") {
    var agent = navigator.userAgent;
    var agents = [];
    agents[0] = 'Sprint';
    agents[1] = 'BlackBerry';
    agents[2] = 'iPhone';
    agents[3] = 'iPod';
    agents[4] = 'Android';
    agents[5] = 'BlackBerry';
    agents[6] = 'HTC';
    agents[7] = 'LG';
    agents[8] = 'MOT-';
    agents[9] = 'Nokia';
    agents[10] = 'SymbianOS';
    agents[11] = 'Palm';
    agents[12] = 'webOS';
    agents[13] = 'SAMSUNG';
    agents[14] = 'Opera Mini';
    agents[15] = 'SonyEricsson';
    agents[16] = 'Sanyo';
    for (i = 0; i < agents.length; i++) {
        var cur_agent = agents[i];
        if (agent.match(cur_agent)) {
            mobile_redirect()
        }
    }
}