# National Aeronautics and Space Administration

## Goddard Space Flight Center

### Search:

Flight Projects | Sciences and Exploration

Skip Navigation (press 2)
- First Tab
- Second Tab
- Third Tab
- Fourth Tab

- Tab Navigation
- Banners
- Top Navigation
- Left Navigation
- Columns & Layout
- General Styles & Tables
- Building Your Site
- Best Practices & Policies

## External Links

- Here is where you can link to websites, either inside or outside of NASA
- The left navigation buttons above should be like a table of contents into your site
- Each page linked from the left navigation buttons should have the same navigation button set

## Left Navigation Section

The left navigation section is the column containing the Left Navigation and the Quick Links. You can also use this as a regular content column in the "no left nav" option.

### Please read instructions carefully before beginning work

This page will explain how to use the left navigation section, activate, and deactivate items, and create a sub navigation. To remove the left navigation entirely, please see the Columns & Layout Section.

## Overview

Left navigation section resides inside the leftnav div:

## Adding & Highlighting Left Navigation Items

To add a link insert a list item

between the list tag

To highlight an item as the current page, add class=active to link tag:

## Creating Sub-Navigation

To create sub navigation, add the links as a list

give the list tag a class "subnav":

To highlight sub navigation item, add class="active" to its link: