User:Enterprisey/undelete-backlink.js

$( function {    if( mw.config.get( "wgPageName" ) === "Special:Undelete" && window.location.search.indexOf( "timestamp=" ) >= 0 ) {       mw.loader.using( [ "mediawiki.util" ], function  { $( "#bodyContent" ).prepend( $( " " )               .attr( "id", "contentSub2" )                .append( "< ", $( "" ) .attr( "href", mw.util.getUrl( "Special:Undelete", { target: mw.config.get( "wgRelevantPageName" ) } ) ) .text( "All deleted revisions" ) ) ); } );   } } );