function elem(id) {
    
    if (id.jquery) {
        if (id.size() == 1)
            return id[0];
        return null;
    }

    if (typeof (id) == "string") {
        var jo = jobj(id);
        if (jo.size() == 1)
            return jo[0];
        return null;
    }

    return id;
}

function jobj(id) {
    if (typeof (id) == "string")
        return $("#" + id);

    return $(id);
}

var picWnd;
function showPicture(imgElem) {
    if (picWnd) {
        picWnd.close();
        picWnd = null;
    }
    picWnd = window.open("showpic.aspx?pic=" + imgElem.src, "bwpicture", "resizable=1,scrollbars=1,resize=1,width=812,height=610");
}