function genPDF() {
    window.open( "includes/show_pdf.php", "myWindow", "status = 1, fullscreen=yes,scrollbars=yes" )
}

function show_confirm($url, $id, $action)
{
    var r=confirm("Are you sure?");
    if (r==true) {
        window.location.href = $url + '&id=' + $id + '&action=' + $action;
    } else {
        window.location.href = $url;
    }
}