1 jQuery(function($){

     2 	$( 'body' ).bind( 'click.wp-gallery', function(e){

     3 		var target = $( e.target ), id, img_size;

     4 

     5 		if ( target.hasClass( 'wp-set-header' ) ) {

     6 			( window.dialogArguments || opener || parent || top ).location.href = target.data( 'location' );

     7 			e.preventDefault();

     8 		} else if ( target.hasClass( 'wp-set-background' ) ) {

     9 			id = target.data( 'attachment-id' );

    10 			img_size = $( 'input[name="attachments[' + id + '][image-size]"]:checked').val();

    11 

    12 			jQuery.post(ajaxurl, {

    13 				action: 'set-background-image',

    14 				attachment_id: id,

    15 				size: img_size

    16 			}, function(){

    17 				var win = window.dialogArguments || opener || parent || top;

    18 				win.tb_remove();

    19 				win.location.reload();

    20 			});

    21 

    22 			e.preventDefault();

    23 		}

    24 	});

    25 });