var httpClosePreview = nesneyaratClosePreview();

function nesneyaratClosePreview() {
    var nesne;
    var tarayici = navigator.appName;
    if (tarayici == "Microsoft Internet Explorer") {
        nesne = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
        nesne = new XMLHttpRequest();
    }
    return nesne;
}
function ClosePreview() {
    httpClosePreview.open('get','../_Ajax/setClosePreview.aspx');
    httpClosePreview.onreadystatechange = writeDataClosePreview;
    httpClosePreview.send(null);
}

function writeDataClosePreview() {
    if (httpClosePreview.readyState == 4) {
        window.location = getHost();
    }
}
function getHost() {
    var url = window.location;
    var path = url.protocol + '//' + url.host + url.pathname
    return  path;
}