function pop(page, heading) {
    var sURL = "./articole/" + page;

    var oRequest = new XMLHttpRequest();
    oRequest.open("GET", sURL, false);
    oRequest.setRequestHeader("User-Agent", navigator.userAgent);
    oRequest.send(null);
    
    var content = '';    
    if (oRequest.status == 200) content = oRequest.responseText;
    else if (oRequest.status == 404) content = "Eroare 404: Pagina nu a fost gasita";
    else content = "Eroare "+oRequest.status;
    
    var div1 = $('<div id="popupContact"/>').html(
                  '<a id="popupContactClose">x</a><div class="middle"><h1>' + heading + 
                  '</h1>' + content + 
                  '</div>');

    div1.appendTo('body');
    $('<div id="backgroundPopup"/>').appendTo('body');



    var popupStatus = 0;

    function loadPopup() {
        //loads popup only if it is disabled  
        if (popupStatus == 0) {
            $("#backgroundPopup").css({
                "opacity": "0.7"
            });
            $("#backgroundPopup").fadeIn("slow");
            $("#popupContact").fadeIn("slow");
            popupStatus = 1;
        }
    }

    function disablePopup() {
        //disables popup only if it is enabled  
        if (popupStatus == 1) {
            $("#backgroundPopup").fadeOut("slow");
            $("#popupContact").fadeOut("slow");
            popupStatus = 0;
            $('#popupContact').remove();
        }
    }

    function centerPopup() {
        //request data for centering  
        var windowWidth = document.documentElement.clientWidth;
        var windowHeight = document.documentElement.clientHeight;

        var popupHeight = $("#popupContact").height();
        var popupWidth = $("#popupContact").width();
        //centering  
        $("#popupContact").css({
            "position": "absolute",
            "top": windowHeight / 2 - popupHeight / 2,
            "left": windowWidth / 2 - popupWidth / 2
        });
        //only need force for IE6  
        $("#backgroundPopup").css({
            "height": windowHeight
        });

    }


    $("#popupContactClose").click(function () {
        disablePopup();
    });
    //Click out event!  
    $("#backgroundPopup").click(function () {
        disablePopup();
    });
    //Press Escape event!  
    $(document).keypress(function (e) {
        if (e.keyCode == 27 & popupStatus == 1) {
            disablePopup();
        }
    });
    //centering with css  
    centerPopup();
    //load popup  
    loadPopup();
}