This page does not meet the requirements for Bobby Approved status. Below is a list of 1 Priority 1 accessibility errors found:

1. Provide alternative text for all images. (1 instance)
   Lines 15-16
   

User Checks

User checks are triggered by something specific on the page; however, you need to determine whether they apply. Bobby Approval requires that none of them apply to your page. Please review these 2 item(s):

1. If you use color to convey information, make sure the information is also represented another way.
   
   
2. If an image conveys important information beyond what is its alternative text, provide an extended description. (1 instance)
   Lines 15-16
   

The following 4 item(s) are not triggered by any specific feature on your page, but are still important for accessibility and are required for Bobby Approved status.

3. Ensure that descriptions of dynamic content are updated with changes in content.
   
   
4. Use the simplest and most straightforward language that is possible.
   
   
5. Avoid ASCII art.
   
   
6. If you can't make a page accessible, construct an alternate accessible version.
   
   

Bobby Approved status is assigned on the basis of Priority 1 items in the Web Content Guidelines. For a higher level of accessibility you may also want to examine Priority 2 and Priority 3 items. 1 Priority 2 issue(s) that Bobby has identified are presented below.

1. Avoid use of deprecated language features if possible. (6 instances)
   Line 9, Line 11, Line 13, Line 15
   

User Checks

3 Priority 2 issue(s) that Bobby has identified are presented below:

1. Check that the foreground and background colors contrast sufficiently with each other.
   
   
2. Avoid using movement in images where possible. (1 instance)
   Lines 15-16
   
3. Add a descriptive title to links when needed.
   
   

The following 8 item(s) are not triggered by any specific feature on your page, but are still important for accessibility.

4. Use a clear, consistent navigation structure.
   
   
5. Make sure your document validates to formal published grammars.
   
   
6. Where it's possible to mark up content (for example mathematical equations) instead of using images, use a markup language (such as MathML).
   
   
7. Use metadata to add computer-understandable information about the page.
   
   
8. Group related elements when possible.
   
   
9. Ensure that dynamic content is accessible or provide an alternate presentation or page.
   
   
10. Offer a site map or table of contents, and provide a description of the general layout of the site, the access features used, and how to use them.
    
    
11. Use the latest technology specification available whenever possible.
    
    

Bobby Approved status is assigned on the basis of Priority 1 items in the Web Content Guidelines. For a higher level of accessibility you may also want to examine Priority 2 and Priority 3 items. 1 Priority 3 issue(s) that Bobby has identified are presented below.

1. Identify the language of the text. (1 instance)
   Line 1
   

User Checks

2 Priority 3 issue(s) that Bobby has identified are presented below:

1. Consider adding keyboard shortcuts to frequently used links.
   
   
2. Specify a logical tab order among form controls, links and objects.
   
   

The following 9 item(s) are not triggered by any specific feature on your page, but are still important for accessibility.

3. Create a consistent style of presentation between pages.
   
   
4. Provide a link at the beginning of a group of related links to bypass the group.
   
   
5. Use icons or graphics (with accessible alternatives) to facilitate comprehension of the page.
   
   
6. Allow users to customize their experience of the web page.
   
   
7. Use the ABBR and ACRONYM elements to denote and expand abbreviations and acronyms.
   
   
8. Offer navigation bars for easy access to the navigation structure.
   
   
9. Place distinguishing information at the beginning of headings, paragraphs, lists, etc.
   
   
10. If ASCII art is present, provide a means to skip over it.
    
    
11. Offer different types of searches for different skill levels and preferences.
    
    

The following section contains a list of 3 browser compatibility errors. Browser compatibility errors help to determine when HTML tags and their attributes are not compatible with certain web browsers or HTML specifications. Browser compatibility errors do not affect the accessibility rating of a page.

1. Unknown attribute NATURALSIZEFLAG in element IMG. for browser(s): Lynx2.7, Explorer4.01, Navigator4.0, HTML4.0 (1 instance)
   Lines 15-16
   
2. Required attribute ALT is missing from tag IMG for browser(s): HTML4.0 (1 instance)
   Lines 15-16
   
3. Unknown attribute HTTP-EQUIV in element META. for browser(s): Lynx2.7 (1 instance)
   Line 4
   

The following three-column table gives download time statistics for the images, applets, and objects on this page. The first column contains the URL of each item, the second column the item size in kilobytes, and the third column the approximate download time for each item when using a 28,800 baud modem. At the end of the report, an arbitrary delay of 0.5 seconds is added for each file to account for slow-downs caused by HTTP connection times.

URL	Size	Time (secs)
http://thunder.nsstc.nasa.gov/bookshelf/news/table1.html	1.02 K	0.28
http://thunder.nsstc.nasa.gov/bookshelf/news/ldar_table1.gif	16.27 K	4.52
Total	17.28 K	4.80
HTTP Request Delays	--	1.00
Total + Delays	--	5.80