About this report

The Bobby report presents an accessibility evaluation grouped by the three priority levels defined by the Web Access Initiative (WAI), as well as browser compatibility and download statistics. As an automated evaluation tool, Bobby is able to detect many accessibility problems and to highlight other possible problems that must be checked. A "Bobby" hat in the original page (if displayed) indicates that Bobby was able to detect a Priority 1 problem with accessibility. A question mark indicates a Priority 1 item that needs to be checked by the user. Follow the links provided in the report to get details about any problem reported, including how to repair it, if needed. For more information on the report, please access our online documentation.

To be Bobby Approved, a page must pass all of the Priority 1 accessibility checkpoints established by the WAI.




Click on the error messages below to find out more information.

Priority 1 Accessibility

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. (18 instances)
    Lines 122-125, Lines 127-130, Lines 147-150, Lines 152-155, Lines 157-160, Lines 162-165, Lines 183-186, Lines 188-191, Lines 193-196, Lines 198-201, Lines 219-222, Lines 224-227, Lines 229-232, Lines 234-237, Lines 255-258, Lines 260-263, Lines 265-268, Lines 270-273

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 7 item(s):

  1. Provide alternative content for each SCRIPT that conveys important information or functionality.

  2. If an image conveys important information beyond what is its alternative text, provide an extended description. (36 instances)
    Lines 41-42, Lines 43-45, Lines 46-47, Lines 48-50, Lines 51-52, Lines 53-54, Lines 55-56, Lines 57-58, Lines 59-60, Lines 61-62, Lines 63-64, Lines 65-66, Lines 67-68, Lines 73-74, Lines 75-76, Lines 77-78, Lines 82-83, Lines 122-125, Lines 127-130, Lines 147-150, Lines 152-155, Lines 157-160, Lines 162-165, Lines 183-186, Lines 188-191, Lines 193-196, Lines 198-201, Lines 219-222, Lines 224-227, Lines 229-232, Lines 234-237, Lines 255-258, Lines 260-263, Lines 265-268, Lines 270-273, Line 475
  3. For tables not used for layout (for example, a spreadsheet), identify headers for the table rows and columns. (12 instances)
    Line 39, Line 112, Line 143, Line 179, Line 215, Line 251, Line 140, Line 290, Line 360, Line 398, Line 429, Line 452
  4. If you use color to convey information, make sure the information is also represented another way.

  5. Provide both a description and a synchronized caption for video information. (2 instances)
    Line 133, Lines 135-136
  6. If a table has two or more rows or columns that serve as headers, use structural markup to identify their hierarchy and relationship. (9 instances)
    Line 71, Line 39, Lines 91-93, Line 89, Line 112, Line 140, Line 398, Line 429, Line 452
  7. Provide a synchronized textual transcript for the audio in videos. (2 instances)
    Line 133, Lines 135-136

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.

  1. Ensure that descriptions of dynamic content are updated with changes in content.

  2. Use the simplest and most straightforward language that is possible.

  3. Avoid ASCII art.

  4. If you can't make a page accessible, construct an alternate accessible version.

Not Bobby ApprovedThis page does not yet meet the requirements for Bobby Approved status.


Priority 2 Accessibility

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. 4 Priority 2 issue(s) that Bobby has identified are presented below.

  1. Avoid use of deprecated language features if possible. (87 instances)
    Line 38, Line 87, Line 103, Line 108, Line 115, Line 121, Line 126, Line 133, Line 168, Line 169, Line 170, Line 171, Line 204, Line 205, Line 206, Line 207, Line 240, Line 241, Line 242, Line 243, Line 276, Line 277, Line 278, Line 279, Line 288, Line 289, Line 293, Line 294, Line 295, Line 298, Line 299, Line 300, Line 304, Line 305, Line 306, Line 310, Line 311, Line 312, Line 315, Line 316, Line 317, Line 320, Line 321, Line 322, Line 326, Line 327, Line 328, Line 332, Line 333, Line 334, Line 337, Line 338, Line 339, Line 347, Line 351, Line 359, Line 364, Line 366, Line 369, Line 370, Line 373, Line 374, Line 379, Line 380, Line 384, Line 385, Line 390, Line 391, Line 400, Line 405, Line 411, Line 416, Line 422, Line 431, Line 432, Line 435, Line 436, Line 440, Line 441, Line 444, Line 445, Line 451, Line 459, Line 469, Line 470
  2. Separate adjacent links with more than whitespace. (1 instance)
    Lines 135-136
  3. Use relative sizing and positioning (% values) rather than absolute (pixels). (14 instances)
    Line 39, Line 89, Line 103, Line 106, Line 112, Line 115, Line 140, Line 289, Line 290, Line 348, Line 360, Line 398, Line 429, Line 452
  4. Make sure event handlers do not require use of a mouse. (6 instances)
    Line 43, Line 48, Line 53, Line 57, Line 61, Line 65

User Checks

6 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. Use header elements in the proper sequence and not for bold text.

  3. Avoid using movement in images where possible. (17 instances)
    Lines 41-42, Lines 43-45, Lines 46-47, Lines 48-50, Lines 51-52, Lines 53-54, Lines 55-56, Lines 57-58, Lines 59-60, Lines 61-62, Lines 63-64, Lines 65-66, Lines 67-68, Lines 73-74, Lines 75-76, Lines 77-78, Line 475
  4. If scripts create pop-up windows or change the active window, ensure that the user is aware this is happening. (1 instance)
    Line 11
  5. Avoid using tables to format text documents in columns unless the table can be linearized. (9 instances)
    Line 71, Line 39, Lines 91-93, Line 89, Line 112, Line 140, Line 398, Line 429, Line 452
  6. 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.

  1. Use a clear, consistent navigation structure.

  2. Make sure your document validates to formal published grammars.

  3. Where it's possible to mark up content (for example mathematical equations) instead of using images, use a markup language (such as MathML).

  4. Use metadata to add computer-understandable information about the page.

  5. Group related elements when possible.

  6. Ensure that dynamic content is accessible or provide an alternate presentation or page.

  7. 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.

  8. Use the latest technology specification available whenever possible.


Priority 3 Accessibility

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

  1. Identify the language of the text. (1 instance)
    Line 1
  2. Provide a summary and caption for tables. (16 instances)
    Line 71, Line 39, Lines 91-93, Line 89, Line 112, Line 143, Line 179, Line 215, Line 251, Line 140, Line 290, Line 348, Line 360, Line 398, Line 429, Line 452

User Checks

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

  1. Provide abbreviations for long row or column labels. (16 instances)
    Line 71, Line 39, Lines 91-93, Line 89, Line 112, Line 143, Line 179, Line 215, Line 251, Line 140, Line 290, Line 348, Line 360, Line 398, Line 429, Line 452
  2. Specify a logical tab order among form controls, links and objects.

  3. Consider adding keyboard shortcuts to frequently used links.

  4. Group related links.

  5. Provided a linear text alternative for tables that lay out content in parallel, word-wrapped columns. (16 instances)
    Line 39, Line 71, Line 89, Lines 91-93, Line 112, Line 140, Line 143, Line 179, Line 215, Line 251, Line 290, Line 348, Line 360, Line 398, Line 429, Line 452

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

  1. Create a consistent style of presentation between pages.

  2. Provide a link at the beginning of a group of related links to bypass the group.

  3. Use icons or graphics (with accessible alternatives) to facilitate comprehension of the page.

  4. Allow users to customize their experience of the web page.

  5. Use the ABBR and ACRONYM elements to denote and expand abbreviations and acronyms.

  6. Offer navigation bars for easy access to the navigation structure.

  7. Place distinguishing information at the beginning of headings, paragraphs, lists, etc.

  8. If ASCII art is present, provide a means to skip over it.

  9. Offer different types of searches for different skill levels and preferences.


Browser Compatibility Errors

The following section contains a list of 14 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 ALIGH in element DIV. for browser(s): Lynx2.7, Explorer4.01, Navigator4.0, HTML4.0 (2 instances)
    Line 38, Line 87
  2. Attribute ALINK in element BODY needs a valid color. for browser(s): Explorer4.01, Navigator4.0 (1 instance)
    Line 8
  3. Unknown attribute BORDERCOLOR in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 91-93
  4. Unknown attribute WIDTH in element TD. for browser(s): Lynx2.7 (3 instances)
    Line 121, Line 126, Line 469
  5. Unknown attribute NAME in element IMG. for browser(s): Lynx2.7 (7 instances)
    Lines 43-45, Lines 48-50, Lines 53-54, Lines 57-58, Lines 61-62, Lines 65-66, Lines 75-76
  6. Attribute NOSHADE in element HR is assigned an incorrect value. for browser(s): Lynx2.7 (2 instances)
    Line 455, Line 465
  7. Unknown attribute BGCOLOR in element TABLE. for browser(s): Lynx2.7 (2 instances)
    Line 89, Lines 91-93
  8. Required attribute TYPE is missing from tag SCRIPT for browser(s): HTML4.0 (1 instance)
    Line 11
  9. Unknown attribute BORDERCOLORLIGHT in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 91-93
  10. Unknown element name TBODY for browser(s): Navigator4.0 (14 instances)
    Line 144, Line 173, Line 180, Line 209, Line 216, Line 245, Line 252, Line 281, Line 291, Line 342, Line 349, Line 357, Line 361, Line 395
  11. Unknown attribute BORDERCOLORDARK in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 91-93
  12. Unknown attribute COLS in element TABLE. for browser(s): HTML4.0 (1 instance)
    Lines 91-93
  13. Unknown attribute BGCOLOR in element TD. for browser(s): Lynx2.7 (1 instance)
    Line 95
  14. Required attribute ALT is missing from tag IMG for browser(s): HTML4.0 (18 instances)
    Lines 122-125, Lines 127-130, Lines 147-150, Lines 152-155, Lines 157-160, Lines 162-165, Lines 183-186, Lines 188-191, Lines 193-196, Lines 198-201, Lines 219-222, Lines 224-227, Lines 229-232, Lines 234-237, Lines 255-258, Lines 260-263, Lines 265-268, Lines 270-273

Download Time

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/TRMM_LaunchInformation.html 20.63 K 5.73
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_left.gif 0.36 K 0.10
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_home.gif 0.44 K 0.12
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_middle2.gif 0.38 K 0.10
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_primer.gif 0.44 K 0.12
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_dataset.gif 0.64 K 0.18
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_research.gif 0.96 K 0.27
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_validation.gif 0.57 K 0.16
http://thunder.nsstc.nasa.gov/images/tabs/listab_front_middle1.gif 0.38 K 0.11
http://thunder.nsstc.nasa.gov/images/tabs/listab_front_bookshelf.gif 0.65 K 0.18
http://thunder.nsstc.nasa.gov/images/tabs/listab_front_right.gif 0.38 K 0.10
http://thunder.nsstc.nasa.gov/images/desc/desc_spacer_left.gif 0.16 K 0.04
http://thunder.nsstc.nasa.gov/images/desc/desc_spacer_middle.gif 0.18 K 0.05
http://thunder.nsstc.nasa.gov/images/desc/desc_spacer_right.gif 0.16 K 0.04
http://thunder.nsstc.nasa.gov/images/titles/titles_bookshelf.jpg 12.03 K 3.34
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_title3_pre.jpg 3.88 K 1.08
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_title2_pre.jpg 2.83 K 0.78
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc01_pre.jpg 2.59 K 0.72
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc02_pre.jpg 2.04 K 0.57
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc03_pre.jpg 3.30 K 0.92
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc04_pre.jpg 2.02 K 0.56
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc05_pre.jpg 2.11 K 0.59
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc06_pre.jpg 1.82 K 0.51
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc07_pre.jpg 1.82 K 0.50
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc08_pre.jpg 2.69 K 0.75
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc09_pre.jpg 1.86 K 0.52
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc10_pre.jpg 2.02 K 0.56
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc11_pre.jpg 2.04 K 0.57
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc12_pre.jpg 2.09 K 0.58
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc13_pre.jpg 2.12 K 0.59
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc14_pre.jpg 2.19 K 0.61
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc15_pre.jpg 1.94 K 0.54
http://thunder.nsstc.nasa.gov/bookshelf/images/saishin5_tnsc16_pre.jpg 4.88 K 1.35
http://thunder.nsstc.nasa.gov/images/fullwhite.gif 3.34 K 0.93
Total
85.91 K
23.86
HTTP Request Delays
--
17.00
Total + Delays
--
40.86