//=========================== Otvaranie v novom okne ===========================
function addTarget() {

    if (!document.getElementsByTagName) {

        return false;

    }

    var links = document.getElementsByTagName("a");

    for (var i = 0; i < links.length; i++) {

        var link = links[i];

        if (link.getAttribute("href") && 
            link.getAttribute("rel") == "external") {

            link.target = "_blank";
        }

    }

}

if (window.attachEvent) {

    window.attachEvent("onload", addTarget);

} else if (window.addEventListener) {

    window.addEventListener("load", addTarget, false);

} else {

    document.addEventListener("load", addTarget, false);

}