function mgm_load_payment_jsfiles($content)
{
    $id = get_the_ID();
    if (is_numeric($id)) {
        $post_obj = mgm_get_post($id);
        if (isset($post_obj->purchasable) && $post_obj->purchasable == 'Y' && !wp_script_is('jquery.metadata')) {
            $incfiles = '';
            $css_files = array();
            $css_files[] = MGM_ASSETS_URL . 'css/mgm_cc_fields.css';
            $css_link_format = '<link rel="stylesheet" href="%s" type="text/css" media="all" />';
            // add
            foreach ($css_files as $css_file) {
                $incfiles .= sprintf($css_link_format, $css_file) . "\n";
            }
            $js_files = array();
            // jquery from wp distribution
            //$js_files[] = includes_url( '/js/jquery/jquery.js');
            // custom
            if (!wp_script_is('mgm-jquery-validate')) {
                if (!mgm_is_script_already_included('jquery.validate.pack.js')) {
                    $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.validate.pack.js';
                    $mgm_scripts[] = 'jquery.validate.pack.js';
                }
            }
            wp_enqueue_script('jquery.metadata', MGM_ASSETS_URL . 'js/jquery/jquery.metadata.js');
            if (!wp_script_is('mgm-jquery-metadata')) {
                if (!mgm_is_script_already_included('jquery.metadata.js')) {
                    $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.metadata.js';
                    $mgm_scripts[] = 'jquery.metadata.js';
                }
            }
            if (!wp_script_is('mgm-helpers')) {
                $js_files[] = MGM_ASSETS_URL . 'js/helpers.js';
            }
            $js_script_format = '<script type="text/javascript" src="%s"></script>';
            if ($js_files) {
                foreach ($js_files as $js_file) {
                    $incfiles .= sprintf($js_script_format, $js_file) . "\n";
                }
            }
            $content .= $incfiles;
            unset($js_files);
            unset($css_files);
            unset($incfiles);
        }
    }
    return $content;
}
function mgm_attach_scripts($return = false, $exclude = array('jquery.ajaxfileupload.js'))
{
    global $mgm_scripts;
    // wp login form
    $wordpres_login_form = mgm_check_wordpress_login();
    // int css array
    $css_files = array();
    // subscribe page css, loaded from wp-admin
    /*
    if( mgm_get_query_var('purchase_subscription') || mgm_get_query_var('payment_return')):
    	$css_files[] = admin_url('/css/login.css');
    	$css_files[] = admin_url('/css/colors-fresh.css'); 
    endif; 
    */
    // group
    $css_group = mgm_get_css_group();
    //issue #867
    if ($css_group != 'none') {
        // other, loaded from mgm custom
        $css_files[] = MGM_ASSETS_URL . 'css/' . $css_group . '/mgm.form.fields.css';
        $css_files[] = MGM_ASSETS_URL . 'css/' . $css_group . '/mgm.site.css';
        $css_files[] = MGM_ASSETS_URL . 'css/' . $css_group . '/mgm.cc.fields.css';
        $css_files[] = MGM_ASSETS_URL . 'css/' . $css_group . '/mgm/jquery.ui.css';
        $css_files[] = MGM_ASSETS_URL . 'css/' . $css_group . '/mgm.pages.css';
    }
    // disable
    $disable_jquery = false;
    //this is for blocking loading jquery externally, to disable jquery add_filter and modify disable_jquery to return true
    $disable_jquery = apply_filters('disable_jqueryon_page', $disable_jquery);
    // init js array
    $js_files = array();
    $arr_default_pages = array('wp-login.php', 'user-edit.php', 'profile.php');
    $default_page = in_array(basename($_SERVER['SCRIPT_FILENAME']), $arr_default_pages) ? true : false;
    // jquery from wp distribution
    if ($default_page && !in_array('jquery.js', (array) $mgm_scripts) || !wp_script_is('jquery') && !$disable_jquery) {
        if ($default_page && !in_array('jquery.js', (array) $mgm_scripts) || !mgm_is_script_already_included('jquery.js')) {
            $js_files[] = includes_url('/js/jquery/jquery.js');
            $mgm_scripts[] = 'jquery.js';
        }
    }
    // custom
    //if(!wp_script_is('mgm-jquery-validate'))
    //	if(!mgm_is_script_already_included('jquery.validate.pack.js')) {
    if ($default_page && !in_array('jquery.validate.pack.js', (array) $mgm_scripts) || !wp_script_is('mgm-jquery-validate') && !mgm_is_script_already_included(MGM_ASSETS_URL . 'js/jquery/jquery.validate.pack.js', true)) {
        $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.validate.pack.js';
        $mgm_scripts[] = 'jquery.validate.pack.js';
    }
    //if(!wp_script_is('mgm-jquery-metadata'))
    //	if(!mgm_is_script_already_included('jquery.metadata.js')) {
    if ($default_page && !in_array('jquery.metadata.js', (array) $mgm_scripts) || !wp_script_is('mgm-jquery-metadata') && !mgm_is_script_already_included(MGM_ASSETS_URL . 'js/jquery/jquery.metadata.js', true)) {
        $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.metadata.js';
        $mgm_scripts[] = 'jquery.metadata.js';
    }
    //if(!wp_script_is('mgm-helpers'))
    //	if(!mgm_is_script_already_included('helpers.js', true)) {
    if ($default_page && !in_array('helpers.js', (array) $mgm_scripts) || !wp_script_is('mgm-helpers') && !mgm_is_script_already_included(MGM_ASSETS_URL . 'js/helpers.js', true)) {
        $js_files[] = MGM_ASSETS_URL . 'js/helpers.js';
        $mgm_scripts[] = 'helpers.js';
    }
    // ui on wp version
    $jqueryui_version = mgm_get_jqueryui_version();
    // add to array
    //if(!wp_script_is('mgm-jquery-ui')) {
    //if(!mgm_is_script_already_included('jquery-ui-'.$jqueryui_version.'.min.js')) {
    if ($default_page && !in_array('jquery-ui-' . $jqueryui_version . '.min.js', (array) $mgm_scripts) || !wp_script_is('mgm-jquery-ui') && !mgm_is_script_already_included('jquery-ui-' . $jqueryui_version . '.min.js')) {
        $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.ui/jquery-ui-' . $jqueryui_version . '.min.js';
        $mgm_scripts[] = 'jquery-ui-' . $jqueryui_version . '.min.js';
    }
    //}
    //if(!wp_script_is('mgm-jquery-ajaxupload')) {
    //	if(!mgm_is_script_already_included('jquery.ajaxfileupload.js')) {
    if ($default_page && !in_array('jquery.ajaxfileupload.js', (array) $mgm_scripts) || !mgm_is_script_already_included(MGM_ASSETS_URL . 'js/jquery/jquery.ajaxfileupload.js', true) && !wp_script_is('mgm-jquery-ajaxupload')) {
        $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.ajaxfileupload.js';
        $mgm_scripts[] = 'jquery.ajaxfileupload.js';
    }
    //}
    // if(!wp_script_is('mgm-jquery-watermarkinput'))
    // $js_files[] = MGM_ASSETS_URL . 'js/jquery/jquery.watermarkinput.js';
    // init
    $scripts = '';
    // css format
    $css_link_format = '<link rel="stylesheet" href="%s" type="text/css" media="all" />';
    // add
    foreach ($css_files as $css_file) {
        $scripts .= sprintf($css_link_format, $css_file);
    }
    // js format
    $js_script_format = '<script type="text/javascript" src="%s"></script>';
    // add
    if ($js_files) {
        foreach ($js_files as $js_file) {
            $scripts .= sprintf($js_script_format, $js_file);
        }
    }
    // return
    if ($return) {
        return $scripts;
    } else {
        echo $scripts;
    }
}