A number of stage class drop-down three ranges is just not working

I’ve three drop-down listing in cascade, I am utilizing the code of Ján Bočínec however it working simply the primary stage after I select the grade it not work, ought to allow the third drop-down listing and present the teams.

I see that the jQuery('#parent_grado').change is just not working, I do not know if is as a result of is created dynamically.

Are you able to please assist me to seek out the bug or recommendation me if is feasible the best way that I attempt to created the online web page of my college thanks

That is my code modified

<?php
 //Mum or dad youngster con ajax

 perform parent_child_cat_select() { ?>
    <script kind="textual content/javascript">
        /* <![CDATA[ */
    jQuery(document).ready(function() {

        //segundo drop down
        jQuery('#parent_grado').change(function(){
            var parentgrado=jQuery('#parent_grado').val();
            alert("hola");
            // call ajax
            jQuery.ajax({
                url:'/dentrorealdelvalle/wp-admin/admin-ajax.php',
                type:'POST',
                data:'action=category_select_action&nameid=parent_grupo&parent_cat_ID=' + parentgrado,
                success:function(results)
                {
                    jQuery("#sub_grupo_div").html(results);
                }
            })
        });

//primer drop down
        jQuery('#parent_cat').change(function(){
            var parentCat=jQuery('#parent_cat').val();              
            // call ajax
            jQuery.ajax({
                url:'/dentrorealdelvalle/wp-admin/admin-ajax.php',
                type:'POST',
                data:'action=category_select_action&nameid=parent_grado&parent_cat_ID=' + parentCat,
                success:function(results)
                {
                    jQuery("#sub_cat_div").html(results);
                }
            })
        });



    });


    /* ]]> */
</script>

<type motion="<?php bloginfo('url'); ?>/" methodology="get">

    <div id="parent_cat_div"><?php 
    $phrases=get_terms('grupos',
        array(
            'hide_empty' => false,
            'mum or dad' => 0,
        )
        );
        $datosparent="";
    echo '<choose id="parent_cat" identify="escuelas">';
        // Get classes as array  
         echo '<possibility disabled chosen worth> -- Seleccione Escuela -- </possibility>';
        foreach ( $phrases as $time period ) :
            echo '<possibility worth="' . $term->term_id . '">' . $term->identify . '</possibility>';
            $datosparent=$datosparent . ',' . $term->term_id;
        endforeach;
    echo '</choose>';
     ?></div>       

    <div id="sub_cat_div"><choose identify="sub_cat_disabled" id="parent_grado" disabled="disabled"><possibility>Seleccione grado!</possibility></choose></div>

    <div id="sub_grupo_div"><choose identify="sub_grupo_disabled" id="parent_grupo" disabled="disabled"><possibility>Seleccione grupo!</possibility></choose></div>

    <div id="submit_div"><enter kind="submit" worth="View" /></div>

</type>
<?php }

//Primer dropdown grado

perform implement_ajax() {
    $parent_cat_ID = $_POST['parent_cat_ID'];
    $nameid = $_POST['nameid'];
    if ( isset($parent_cat_ID) )
    {
        $phrases=get_terms('grupos',
        array(
            'hide_empty' => false,
            'mum or dad' => $parent_cat_ID,
        )
        );      
    if ( $phrases ) {
            echo '<choose id="' . $nameid . '" identify="grado">';
            // Get classes as array
            echo '<possibility disabled chosen worth> -- Seleccione Grado -- </possibility>';
            foreach ( $phrases as $time period ) :
                echo '<possibility worth="' . $term->term_id . '">' . $term->identify . '</possibility>';
            endforeach;
            echo '</choose>';

    } else {
        ?><choose identify="sub_cat_disabled" id="sub_cat_disabled" disabled="disabled"><possibility>No youngster classes!</possibility></choose><?php
    }
    die();
} // finish if
}
add_action('wp_ajax_category_select_action', 'implement_ajax');
add_action('wp_ajax_nopriv_category_select_action', 'implement_ajax');//for customers that aren't logged in.

Thanks on your assist