source: trunk/www.guidonia.net/wp/wp-admin/js/link.dev.js@ 44

jQuery(document).ready( function($) {

        var newCat, noSyncChecks = false, syncChecks, catAddAfter;

        $('#link_name').focus();
        // postboxes
        postboxes.add_postbox_toggles('link');

        // category tabs
        $('#category-tabs a').click(function(){
                var t = $(this).attr('href');
                $(this).parent().addClass('tabs').siblings('li').removeClass('tabs');
                $('.tabs-panel').hide();
                $(t).show();
                if ( '#categories-all' == t )
                        deleteUserSetting('cats');
                else
                        setUserSetting('cats','pop');
                return false;
        });
        if ( getUserSetting('cats') )
                $('#category-tabs a[href="#categories-pop"]').click();

        // Ajax Cat
        newCat = $('#newcat').one( 'focus', function() { $(this).val( '' ).removeClass( 'form-input-tip' ) } );
        $('#category-add-submit').click( function() { newCat.focus(); } );
        syncChecks = function() {
                if ( noSyncChecks )
                        return;
                noSyncChecks = true;
                var th = $(this), c = th.is(':checked'), id = th.val().toString();
                $('#in-link-category-' + id + ', #in-popular-category-' + id).attr( 'checked', c );
                noSyncChecks = false;
        };

        catAddAfter = function( r, s ) {
                $(s.what + ' response_data', r).each( function() {
                        var t = $($(this).text());
                        t.find( 'label' ).each( function() {
                                var th = $(this), val = th.find('input').val(), id = th.find('input')[0].id, name = $.trim( th.text() ), o;
                                $('#' + id).change( syncChecks );
                                o = $( '<option value="' +  parseInt( val, 10 ) + '"></option>' ).text( name );
                        } );
                } );
        };

        $('#categorychecklist').wpList( {
                alt: '',
                what: 'link-category',
                response: 'category-ajax-response',
                addAfter: catAddAfter
        } );

        $('a[href="#categories-all"]').click(function(){deleteUserSetting('cats');});
        $('a[href="#categories-pop"]').click(function(){setUserSetting('cats','pop');});
        if ( 'pop' == getUserSetting('cats') )
                $('a[href="#categories-pop"]').click();

        $('#category-add-toggle').click( function() {
                $(this).parents('div:first').toggleClass( 'wp-hidden-children' );
                $('#category-tabs a[href="#categories-all"]').click();
                return false;
        } );

        $('.categorychecklist :checkbox').change( syncChecks ).filter( ':checked' ).change();
});