Bobby
URL tested: http://thunder.nsstc.nasa.gov/LISbrowse/may00.html, January 7, 2002 10:06:45 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. (31 instances)
    Lines 55-56, Lines 61-62, Lines 67-68, Lines 73-74, Lines 79-80, Lines 85-86, Lines 94-95, Lines 100-101, Lines 106-107, Lines 112-113, Lines 118-119, Lines 124-125, Lines 130-131, Lines 139-140, Lines 145-146, Lines 151-152, Lines 157-158, Lines 163-164, Lines 169-170, Lines 175-176, Lines 184-185, Lines 190-191, Lines 196-197, Lines 202-203, Lines 208-209, Lines 214-215, Lines 220-221, Lines 229-230, Lines 235-236, Lines 241-242, Lines 247-248

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 3 item(s):

  1. If you use color to convey information, make sure the information is also represented another way.

  2. If a table has two or more rows or columns that serve as headers, use structural markup to identify their hierarchy and relationship. (3 instances)
    Lines 14-16, Line 12, Line 28
  3. If an image conveys important information beyond what is its alternative text, provide an extended description. (31 instances)
    Lines 55-56, Lines 61-62, Lines 67-68, Lines 73-74, Lines 79-80, Lines 85-86, Lines 94-95, Lines 100-101, Lines 106-107, Lines 112-113, Lines 118-119, Lines 124-125, Lines 130-131, Lines 139-140, Lines 145-146, Lines 151-152, Lines 157-158, Lines 163-164, Lines 169-170, Lines 175-176, Lines 184-185, Lines 190-191, Lines 196-197, Lines 202-203, Lines 208-209, Lines 214-215, Lines 220-221, Lines 229-230, Lines 235-236, Lines 241-242, Lines 247-248

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

  1. Use relative sizing and positioning (% values) rather than absolute (pixels). (137 instances)
    Line 12, Line 31, Line 33, Line 34, Line 37, Line 52, Line 53, Line 56, Line 57, Line 59, Line 62, Line 63, Line 65, Line 68, Line 69, Line 71, Line 74, Line 75, Line 77, Line 80, Line 81, Line 83, Line 86, Line 87, Line 92, Line 95, Line 96, Line 98, Line 101, Line 102, Line 104, Line 107, Line 108, Line 110, Line 113, Line 114, Line 116, Line 119, Line 120, Line 122, Line 125, Line 126, Line 128, Line 131, Line 132, Line 137, Line 140, Line 141, Line 143, Line 146, Line 147, Line 149, Line 152, Line 153, Line 155, Line 158, Line 159, Line 161, Line 164, Line 165, Line 167, Line 170, Line 171, Line 173, Line 176, Line 177, Line 182, Line 185, Line 186, Line 188, Line 191, Line 192, Line 194, Line 197, Line 198, Line 200, Line 203, Line 204, Line 206, Line 209, Line 210, Line 212, Line 215, Line 216, Line 218, Line 221, Line 222, Line 227, Line 230, Line 231, Line 233, Line 236, Line 237, Line 239, Line 242, Line 243, Line 245, Line 248, Line 249, Line 251, Line 252, Line 253
  2. Avoid use of deprecated language features if possible. (68 instances)
    Line 10, Line 27, Line 31, Line 34, Line 37, Line 56, Line 57, Line 62, Line 63, Line 68, Line 69, Line 74, Line 75, Line 80, Line 81, Line 86, Line 87, Line 95, Line 96, Line 101, Line 102, Line 107, Line 108, Line 113, Line 114, Line 119, Line 120, Line 125, Line 126, Line 131, Line 132, Line 140, Line 141, Line 146, Line 147, Line 152, Line 153, Line 158, Line 159, Line 164, Line 165, Line 170, Line 171, Line 176, Line 177, Line 185, Line 186, Line 191, Line 192, Line 197, Line 198, Line 203, Line 204, Line 209, Line 210, Line 215, Line 216, Line 221, Line 222, Line 230, Line 231, Line 236, Line 237, Line 242, Line 243, Line 248, Line 249, Line 260

User Checks

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

  1. If a table is used for layout only, do not use structural markup to achieve formatting effects. (1 instance)
    Line 28
  2. Check that the foreground and background colors contrast sufficiently with each other.

  3. Avoid using tables to format text documents in columns unless the table can be linearized. (2 instances)
    Lines 14-16, Line 12
  4. 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. (3 instances)
    Lines 14-16, Line 12, Line 28

User Checks

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

  1. Provide abbreviations for long row or column labels. (3 instances)
    Lines 14-16, Line 12, Line 28
  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. (3 instances)
    Line 12, Lines 14-16, Line 28

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 12 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 (35 instances)
    Line 52, Line 53, Line 59, Line 65, Line 71, Line 77, Line 83, Line 92, Line 98, Line 104, Line 110, Line 116, Line 122, Line 128, Line 137, Line 143, Line 149, Line 155, Line 161, Line 167, Line 173, Line 182, Line 188, Line 194, Line 200, Line 206, Line 212, Line 218, Line 227, Line 233, Line 239, Line 245, Line 251, Line 252, Line 253
  2. Unknown attribute ALIGH in element DIV. for browser(s): Lynx2.7, Explorer4.01, Navigator4.0, HTML4.0 (1 instance)
    Line 10
  3. Unknown attribute BORDERCOLOR in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (2 instances)
    Lines 14-16, Line 28
  4. Attribute ALINK in element BODY needs a valid color. for browser(s): Explorer4.01, Navigator4.0 (1 instance)
    Line 8
  5. Unknown attribute WIDTH in element TD. for browser(s): Lynx2.7 (38 instances)
    Line 18, Line 19, Line 20, Line 52, Line 53, Line 59, Line 65, Line 71, Line 77, Line 83, Line 92, Line 98, Line 104, Line 110, Line 116, Line 122, Line 128, Line 137, Line 143, Line 149, Line 155, Line 161, Line 167, Line 173, Line 182, Line 188, Line 194, Line 200, Line 206, Line 212, Line 218, Line 227, Line 233, Line 239, Line 245, Line 251, Line 252, Line 253
  6. Unknown attribute BGCOLOR in element TABLE. for browser(s): Lynx2.7 (2 instances)
    Line 12, Lines 14-16
  7. Unknown attribute BORDERCOLORLIGHT in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (2 instances)
    Lines 14-16, Line 28
  8. Unknown attribute BORDERCOLORDARK in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (2 instances)
    Lines 14-16, Line 28
  9. Unknown attribute HEIGHT in element TH. for browser(s): Lynx2.7, Explorer4.01 (1 instance)
    Line 33
  10. Unknown attribute COLS in element TABLE. for browser(s): HTML4.0 (1 instance)
    Lines 14-16
  11. Unknown attribute BGCOLOR in element TD. for browser(s): Lynx2.7 (3 instances)
    Line 18, Line 19, Line 20
  12. Required attribute ALT is missing from tag IMG for browser(s): HTML4.0 (31 instances)
    Lines 55-56, Lines 61-62, Lines 67-68, Lines 73-74, Lines 79-80, Lines 85-86, Lines 94-95, Lines 100-101, Lines 106-107, Lines 112-113, Lines 118-119, Lines 124-125, Lines 130-131, Lines 139-140, Lines 145-146, Lines 151-152, Lines 157-158, Lines 163-164, Lines 169-170, Lines 175-176, Lines 184-185, Lines 190-191, Lines 196-197, Lines 202-203, Lines 208-209, Lines 214-215, Lines 220-221, Lines 229-230, Lines 235-236, Lines 241-242, Lines 247-248

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/LISbrowse/may00.html 9.24 K 2.57
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.122_T.jpg 5.94 K 1.65
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.123_T.jpg 6.00 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.124_T.jpg 6.02 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.125_T.jpg 5.99 K 1.66
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.126_T.jpg 6.00 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.127_T.jpg 5.96 K 1.66
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.128_T.jpg 5.99 K 1.66
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.129_T.jpg 6.02 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.130_T.jpg 6.03 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.131_T.jpg 6.05 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.132_T.jpg 5.99 K 1.66
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.133_T.jpg 6.01 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.134_T.jpg 6.02 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.135_T.jpg 6.07 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.136_T.jpg 6.04 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.137_T.jpg 6.08 K 1.69
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.138_T.jpg 5.99 K 1.66
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.139_T.jpg 6.06 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.140_T.jpg 6.09 K 1.69
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.141_T.jpg 6.04 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.142_T.jpg 5.93 K 1.65
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.143_T.jpg 5.93 K 1.65
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.144_T.jpg 6.03 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.145_T.jpg 6.00 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.146_T.jpg 6.00 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.147_T.jpg 6.00 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.148_T.jpg 6.09 K 1.69
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.149_T.jpg 6.03 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.150_T.jpg 6.01 K 1.67
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.151_T.jpg 6.04 K 1.68
http://thunder.nsstc.nasa.gov/LISbrowse/2000/jpg/TRMM_LIS_BR.04.0_2000.152_T.jpg 6.09 K 1.69
Total
195.80 K
54.39
HTTP Request Delays
--
16.00
Total + Delays
--
70.39