function Foto(img, txt){
    foto1 = new Image();
    foto1.src = (img);
    CheckFoto(img, txt);
}

function CheckFoto(img, txt){
    if ((foto1.width != 0) && (foto1.height != 0)) {
        viewFoto(img, txt);
    }
    else {
        uitvoering = "CheckFoto('" + img + "','" + txt + "')";
        interval = setTimeout(uitvoering, 20);
    }
}

function viewFoto(img, txt){
    imgbreedte = foto1.width;
    imghoogte = foto1.height;
    if (!txt) {
        txt = img
    }
    vars = "width=" + imgbreedte + ",height=" + imghoogte + ",left=" + ((screen.width - imgbreedte) / 2) + ",top=" + ((screen.height - imghoogte) / 2);
    newwindow = window.open("", "nieuwvenster", vars);
    newwindow.document.clear();
    newwindow.document.write("<html>\n<head>\n<title>" + txt + "<\/title>\n");
    newwindow.document.write("<meta http-equiv=\"imagetoolbar\" content=\"no\">\n");
    newwindow.document.write("<\/head>\n\n<body style=\"margin:0px; padding:0px;\" onBlur=\"window.close()\">\n");
    newwindow.document.write("<img src=\"" + img + "\" alt=\"Klik om te sluiten!\" border=\"0\" onclick=\"javascript:window.close()\">\n");
    newwindow.document.write("<\/body>\n<\/html>\n");
    if (newwindow.document.focus) {
        newwindow.document.focus();
    }
    newwindow.document.close();
}

