Index: sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-support/js/forums.js
===================================================================
--- sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-support/js/forums.js	(date 1531994775507)
+++ sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-support/js/forums.js	(date 1531994775507)
@@ -0,0 +1,7 @@
+( function( $ ) {
+
+	$( '#new-post' ).submit(function() {
+		$( '[type="submit"]', $(this) ).prop( 'disabled', 'disabled' );
+	});
+
+} )( window.jQuery );
Index: sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-support/functions.php
===================================================================
--- sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-support/functions.php	(revision 7478)
+++ sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-support/functions.php	(date 1531994827574)
@@ -24,6 +24,7 @@
 	wp_style_add_data( 'forum-wp4-style', 'rtl', 'replace' );
 
 	wp_enqueue_script( 'wporg-support-navigation', get_template_directory_uri() . '/js/navigation.js', array(), '20151217', true );
+	wp_enqueue_script( 'wporg-support-forums', get_template_directory_uri() . '/js/forums.js', array( 'jquery' ), 20180719, true );
 }
 add_action( 'wp_enqueue_scripts', 'wporg_support_scripts' );