Tạo nút media upload trong wordpress

//chen thu vien wordpress
function my_admin_scripts() {
    wp_enqueue_script('media-upload');
    wp_enqueue_script('thickbox');
    wp_register_script('my-upload', WP_PLUGIN_URL.'/my-script.js', array('jquery','media-upload','thickbox'));
    wp_enqueue_script('my-upload');
    //style
    wp_enqueue_style('thickbox');
}
add_action('admin_print_scripts', 'my_admin_scripts');

<input type="text" name="image_url" id="slide_image" value=""/>
<input type="button" id="upload_image" name="upload_image" class="upload-button" onclick="javascript:focus_editor();formfield = jQuery('#slide_image').attr('name'); tb_show('','media-upload.php?type=image&amp;TB_iframe=true'); return false;" value="Image"/>

<script>
function focus_editor(){
    window.restore_send_to_editor = window.send_to_editor;
    // send url back to plugin editor
    window.send_to_editor = function(html){
        if(formfield){
         imgurl = jQuery('img',html).attr('src');
         var data=formfield.val();
         formfield.val((data? data.replace(/[,s]+$/g,'')+',':'')+imgurl);
 
         formfield=null;
        }
        tb_remove();
        window.send_to_editor=window.restore_send_to_editor;
    }
}
    </script>