function checkOS(){
    var OSName="unknownOS";
    if (navigator.appVersion.indexOf("Win") != -1) OSName = "win";
    if (navigator.appVersion.indexOf("Mac") != -1) OSName = "mac";
    if (navigator.appVersion.indexOf("Linux") != -1 || navigator.userAgent.indexOf("Linux") != -1 || navigator.userAgent.indexOf("Unix") != -1) OSName = "linux";
    return OSName;
}

function checkAgent(){
    var agentName="unknownAgent";
    if (navigator.userAgent.indexOf("MSIE") != -1 && navigator.userAgent.indexOf("Win64") != -1 && navigator.userAgent.indexOf("x64") != -1) {
        agentName = "64";
    } else {
        agentName = "32";
    }
    return agentName;
}

/*alert(window.navigator.userAgent);*/
//for tabs jQuery
var os = checkOS();
var selectTab = 1;
if (os == "win") selectTab = 0;
if (os == "mac") selectTab = 1;
if (os == "linux") selectTab = 2;
var agent = checkAgent();