var popupStatus = 0;
function loadPopup() {
    if (popupStatus == 0) {
        $("#backgroundPopup").css('opacity', '0.7');
        $("#backgroundPopup").fadeIn("slow");
        $("#popupContact").fadeIn("slow");
        popupStatus = 1;

    }
}

function disablePopup() {
    if (popupStatus == 1) {
        $("#backgroundPopup").fadeOut("slow");
        $("#popupContact").fadeOut("slow");
        popupStatus = 0;

    }

}

function centerPopup() {
    var winWidth = document.documentElement.clientWidth;
    var winHeight = document.documentElement.clientHeight;
    var popWidth = $("#popupContact").width();
    var popHeight = $("#popupContact").height();

    $("#popupContact").css({
        "position": "absolute",
        "top": winHeight / 2 - popHeight / 2,
        "left": winWidth / 2 - popWidth / 2

    });

    $("#backgroundPopup").css({
        "height": winHeight,
        "width" : winWidth
    });

}