function swapImages($image = 0){
    var $main_image = document.getElementById('main_img');
    var $main_url = $main_image.src;
    $main_image.src = $image.src;
    $image.src = $main_url;
    site_stat('event_photo');
}
function displayMorePremiums(){
    var x = document.getElementsByClassName('premium');
    var i;
    for (i = 0; i < x.length; i++) {
        x[i].style.display = 'block';
    }
    document.getElementById('showmore').style.display = 'none';
}
var ajax = {};
ajax.x = function () {
    if (typeof XMLHttpRequest !== 'undefined') {
        return new XMLHttpRequest();
    }
    var versions = [
        "MSXML2.XmlHttp.6.0",
        "MSXML2.XmlHttp.5.0",
        "MSXML2.XmlHttp.4.0",
        "MSXML2.XmlHttp.3.0",
        "MSXML2.XmlHttp.2.0",
        "Microsoft.XmlHttp"
    ];

    var xhr;
    for (var i = 0; i < versions.length; i++) {
        try {
            xhr = new ActiveXObject(versions[i]);
            break;
        } catch (e) {
        }
    }
    return xhr;
};

ajax.send = function (url, callback, method, data, async) {
    if (async === undefined) {
        async = true;
    }
    var x = ajax.x();
    x.open(method, url, async);
    x.onreadystatechange = function () {
        if (x.readyState == 4) {
            callback(x.responseText)
        }
    };
    if (method == 'POST') {
        x.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
    }
    x.send(data)
};

ajax.get = function (url, data, callback, async) {
    var query = [];
    for (var key in data) {
        query.push(encodeURIComponent(key) + '=' + encodeURIComponent(data[key]));
    }
    ajax.send(url + (query.length ? '?' + query.join('&') : ''), callback, 'GET', null, async)
};

ajax.post = function (url, data, callback, async) {
    var query = [];
    for (var key in data) {
        query.push(encodeURIComponent(key) + '=' + encodeURIComponent(data[key]));
    }
    ajax.send(url, callback, 'POST', query.join('&'), async)
};
function  site_stat($stat = 'view'){
    ajax.get(window.location.href, {stat: $stat}, function() {

    });

}
function  site_stat_from_category($stat = 'view',$site_id = 0){
    ajax.get(window.location.href, {stat: $stat,site_id: $site_id}, function() {
    });

}