Bobby
URL tested: http://thunder.nsstc.nasa.gov/data/old_index.html, January 7, 2002 10:01:10 AM CST
Bobby Core v3.2, WAI Guidelines 1999/05/05

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. (38 instances)
    Line 220, Line 221, Line 222, Line 223, Line 226, Line 230, Line 233, Line 234, Line 235, Line 236, Line 315, Line 384, Line 395, Line 396, Line 397, Line 398, Line 401, Line 404, Line 407, Line 408, Line 409, Line 410, Line 475, Line 536, Line 595, Line 608, Line 609, Line 610, Line 611, Line 614, Line 617, Line 620, Line 621, Line 622, Line 623, Line 687, Line 699, Line 710

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 5 item(s):

  1. If an image conveys important information beyond what is its alternative text, provide an extended description. (29 instances)
    Lines 88-89, Lines 90-92, Lines 93-94, Lines 95-97, Lines 98-99, Lines 100-101, Lines 102-103, Lines 104-105, Lines 106-107, Lines 108-109, Lines 110-111, Lines 112-113, Lines 114-115, Lines 120-121, Lines 122-123, Lines 124-125, Lines 129-130, Line 229, Line 315, Line 384, Line 403, Line 475, Line 536, Line 595, Line 616, Line 687, Line 699, Line 710, Line 750
  2. If you use color to convey information, make sure the information is also represented another way.

  3. For tables not used for layout (for example, a spreadsheet), identify headers for the table rows and columns. (15 instances)
    Line 86, Line 218, Line 243, Line 321, Line 215, Line 393, Line 417, Line 481, Line 540, Line 390, Line 606, Line 630, Line 603, Line 693, Line 725
  4. If a table has two or more rows or columns that serve as headers, use structural markup to identify their hierarchy and relationship. (45 instances)
    Line 118, Line 86, Lines 138-140, Line 136, Line 194, Line 218, Line 246, Line 255, Line 270, Line 296, Line 243, Line 324, Line 330, Line 344, Line 368, Line 321, Line 215, Line 393, Line 420, Line 430, Line 446, Line 461, Line 417, Line 484, Line 493, Line 507, Line 522, Line 481, Line 543, Line 552, Line 566, Line 581, Line 540, Line 390, Line 606, Line 633, Line 643, Line 657, Line 673, Line 630, Line 603, Line 693, Line 600, Line 725, Line 708
  5. Provide alternative content for each SCRIPT that conveys important information or functionality.

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

  1. Avoid use of deprecated language features if possible. (65 instances)
    Line 85, Line 134, Line 199, Line 200, Line 203, Line 214, Line 227, Line 248, Line 257, Line 258, Line 269, Line 273, Line 295, Line 298, Line 302, Line 304, Line 305, Line 306, Line 326, Line 332, Line 333, Line 343, Line 347, Line 367, Line 371, Line 402, Line 422, Line 433, Line 434, Line 445, Line 449, Line 460, Line 463, Line 486, Line 495, Line 506, Line 510, Line 521, Line 525, Line 545, Line 554, Line 565, Line 569, Line 580, Line 584, Line 615, Line 635, Line 645, Line 656, Line 660, Line 671, Line 675, Line 710, Line 724, Line 732, Line 743, Line 744
  2. Use relative sizing and positioning (% values) rather than absolute (pixels). (55 instances)
    Line 86, Line 136, Line 194, Line 199, Line 203, Line 215, Line 220, Line 221, Line 222, Line 223, Line 226, Line 227, Line 228, Line 230, Line 233, Line 234, Line 235, Line 236, Line 317, Line 390, Line 395, Line 396, Line 397, Line 398, Line 401, Line 402, Line 403, Line 404, Line 407, Line 408, Line 409, Line 410, Line 477, Line 538, Line 600, Line 603, Line 608, Line 609, Line 610, Line 611, Line 614, Line 615, Line 616, Line 617, Line 620, Line 621, Line 622, Line 623, Line 693, Line 708, Line 725
  3. Make sure event handlers do not require use of a mouse. (9 instances)
    Line 90, Line 95, Line 100, Line 104, Line 108, Line 112, Lines 228-229, Line 403, Line 616

User Checks

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

  1. Do not use pop-up windows or change the active window unless the user is aware this is happening. (2 instances)
    Line 277, Line 351
  2. Mark up quotations with the Q and BLOCKQUOTE elements.

  3. Check that the foreground and background colors contrast sufficiently with each other.

  4. Avoid using movement in images where possible. (58 instances)
    Lines 88-89, Lines 90-92, Lines 93-94, Lines 95-97, Lines 98-99, Lines 100-101, Lines 102-103, Lines 104-105, Lines 106-107, Lines 108-109, Lines 110-111, Lines 112-113, Lines 114-115, Lines 120-121, Lines 122-123, Lines 124-125, Line 220, Line 221, Line 222, Line 223, Line 226, Line 229, Line 230, Line 233, Line 234, Line 235, Line 236, Line 315, Line 384, Line 395, Line 396, Line 397, Line 398, Line 401, Line 403, Line 404, Line 407, Line 408, Line 409, Line 410, Line 475, Line 536, Line 595, Line 608, Line 609, Line 610, Line 611, Line 614, Line 616, Line 617, Line 620, Line 621, Line 622, Line 623, Line 687, Line 699, Line 710, Line 750
  5. If scripts create pop-up windows or change the active window, ensure that the user is aware this is happening. (11 instances)
    Line 9, Line 39, Line 49, Line 55, Line 61, Line 67, Line 73, Line 79, Line 148, Line 178, Line 188
  6. Avoid using tables to format text documents in columns unless the table can be linearized. (45 instances)
    Line 118, Line 86, Lines 138-140, Line 136, Line 194, Line 218, Line 246, Line 255, Line 270, Line 296, Line 243, Line 324, Line 330, Line 344, Line 368, Line 321, Line 215, Line 393, Line 420, Line 430, Line 446, Line 461, Line 417, Line 484, Line 493, Line 507, Line 522, Line 481, Line 543, Line 552, Line 566, Line 581, Line 540, Line 390, Line 606, Line 633, Line 643, Line 657, Line 673, Line 630, Line 603, Line 693, Line 600, Line 725, Line 708
  7. 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. (45 instances)
    Line 118, Line 86, Lines 138-140, Line 136, Line 194, Line 218, Line 246, Line 255, Line 270, Line 296, Line 243, Line 324, Line 330, Line 344, Line 368, Line 321, Line 215, Line 393, Line 420, Line 430, Line 446, Line 461, Line 417, Line 484, Line 493, Line 507, Line 522, Line 481, Line 543, Line 552, Line 566, Line 581, Line 540, Line 390, Line 606, Line 633, Line 643, Line 657, Line 673, Line 630, Line 603, Line 693, Line 600, Line 725, Line 708

User Checks

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

  1. Provide abbreviations for long row or column labels. (45 instances)
    Line 118, Line 86, Lines 138-140, Line 136, Line 194, Line 218, Line 246, Line 255, Line 270, Line 296, Line 243, Line 324, Line 330, Line 344, Line 368, Line 321, Line 215, Line 393, Line 420, Line 430, Line 446, Line 461, Line 417, Line 484, Line 493, Line 507, Line 522, Line 481, Line 543, Line 552, Line 566, Line 581, Line 540, Line 390, Line 606, Line 633, Line 643, Line 657, Line 673, Line 630, Line 603, Line 693, Line 600, Line 725, Line 708
  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. (45 instances)
    Line 86, Line 118, Line 136, Lines 138-140, Line 194, Line 215, Line 218, Line 243, Line 246, Line 255, Line 270, Line 296, Line 321, Line 324, Line 330, Line 344, Line 368, Line 390, Line 393, Line 417, Line 420, Line 430, Line 446, Line 461, Line 481, Line 484, Line 493, Line 507, Line 522, Line 540, Line 543, Line 552, Line 566, Line 581, Line 600, Line 603, Line 606, Line 630, Line 633, Line 643, Line 657, Line 673, Line 693, Line 708, Line 725

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 17 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 HEIGHT in element TD. for browser(s): Lynx2.7 (4 instances)
    Line 233, Line 234, Line 235, Line 236
  2. Unknown attribute ALIGH in element DIV. for browser(s): Lynx2.7, Explorer4.01, Navigator4.0, HTML4.0 (2 instances)
    Line 85, Line 134
  3. Attribute ALINK in element BODY needs a valid color. for browser(s): Explorer4.01, Navigator4.0 (1 instance)
    Line 8
  4. Unknown attribute BORDERCOLOR in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 138-140
  5. Unknown attribute BGCOLOR in element TR. for browser(s): Lynx2.7 (6 instances)
    Line 219, Line 232, Line 394, Line 406, Line 607, Line 619
  6. Unknown attribute WIDTH in element TD. for browser(s): Lynx2.7 (53 instances)
    Line 142, Line 217, Line 220, Line 221, Line 222, Line 223, Line 226, Line 227, Line 228, Line 230, Line 233, Line 234, Line 235, Line 236, Line 248, Line 317, Line 320, Line 326, Line 392, Line 395, Line 396, Line 397, Line 398, Line 401, Line 402, Line 403, Line 404, Line 407, Line 408, Line 409, Line 410, Line 422, Line 477, Line 486, Line 538, Line 539, Line 545, Line 605, Line 608, Line 609, Line 610, Line 611, Line 614, Line 615, Line 616, Line 617, Line 620, Line 621, Line 622, Line 623, Line 635, Line 695, Line 743
  7. Unknown attribute NAME in element IMG. for browser(s): Lynx2.7 (4 instances)
    Lines 122-123, Line 229, Line 403, Line 616
  8. Attribute NOSHADE in element HR is assigned an incorrect value. for browser(s): Lynx2.7 (2 instances)
    Line 728, Line 739
  9. Attribute SIZE in element FONT must be assigned an integer. for browser(s): Explorer4.01 (4 instances)
    Line 227, Line 402, Line 615, Line 710
  10. Unknown attribute BGCOLOR in element TABLE. for browser(s): Lynx2.7 (29 instances)
    Line 136, Lines 138-140, Line 218, Line 243, Line 255, Line 270, Line 296, Line 321, Line 330, Line 344, Line 368, Line 393, Line 417, Line 430, Line 446, Line 461, Line 481, Line 493, Line 507, Line 522, Line 540, Line 552, Line 566, Line 581, Line 606, Line 630, Line 643, Line 657, Line 673
  11. Unknown attribute WIDTH in element TR. for browser(s): Lynx2.7, Explorer4.01, Navigator4.0, HTML4.0 (4 instances)
    Line 241, Line 415, Line 628, Line 697
  12. Required attribute TYPE is missing from tag SCRIPT for browser(s): HTML4.0 (11 instances)
    Line 9, Line 39, Line 49, Line 55, Line 61, Line 67, Line 73, Line 79, Line 148, Line 178, Line 188
  13. Unknown attribute BORDERCOLORLIGHT in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 138-140
  14. Unknown attribute BORDERCOLORDARK in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 138-140
  15. Unknown attribute COLS in element TABLE. for browser(s): HTML4.0 (1 instance)
    Lines 138-140
  16. Unknown attribute BGCOLOR in element TD. for browser(s): Lynx2.7 (37 instances)
    Line 142, Line 220, Line 223, Line 226, Line 230, Line 233, Line 236, Line 266, Line 292, Line 312, Line 340, Line 364, Line 381, Line 395, Line 398, Line 401, Line 404, Line 407, Line 410, Line 442, Line 457, Line 472, Line 503, Line 518, Line 533, Line 562, Line 577, Line 592, Line 608, Line 611, Line 614, Line 617, Line 620, Line 623, Line 653, Line 668, Line 684
  17. Required attribute ALT is missing from tag IMG for browser(s): HTML4.0 (38 instances)
    Line 220, Line 221, Line 222, Line 223, Line 226, Line 230, Line 233, Line 234, Line 235, Line 236, Line 315, Line 384, Line 395, Line 396, Line 397, Line 398, Line 401, Line 404, Line 407, Line 408, Line 409, Line 410, Line 475, Line 536, Line 595, Line 608, Line 609, Line 610, Line 611, Line 614, Line 617, Line 620, Line 621, Line 622, Line 623, Line 687, Line 699, Line 710

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/data/old_index.html 35.65 K 9.90
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_front_middle1.gif 0.38 K 0.11
http://thunder.nsstc.nasa.gov/images/tabs/listab_front_dataset.gif 0.72 K 0.20
http://thunder.nsstc.nasa.gov/images/tabs/listab_front_middle2.gif 0.39 K 0.11
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_back_bookshelf.gif 0.58 K 0.16
http://thunder.nsstc.nasa.gov/images/tabs/listab_back_right.gif 0.36 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_dataset_info.jpg 9.90 K 2.75
http://thunder.nsstc.nasa.gov/images/black_spacer.gif 0.04 K 0.01
http://thunder.nsstc.nasa.gov/images/order_data-1.gif 0.87 K 0.24
http://thunder.nsstc.nasa.gov/images/spacer.gif 0.05 K 0.01
http://thunder.nsstc.nasa.gov/images/order_data_icon.gif 0.40 K 0.11
http://thunder.nsstc.nasa.gov/images/fullwhite.gif 3.34 K 0.93
Total
56.32 K
15.64
HTTP Request Delays
--
10.50
Total + Delays
--
26.14