Bobby
URL tested: http://thunder.nsstc.nasa.gov/bookshelf/docs/val.html, January 7, 2002 9:56:10 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 web page does not contain any Priority 1 accessibility errors that Bobby can detect. However, certain items require human judgment; these are listed below. Please review these items; if none of these apply to your page, it qualifies for Bobby Approved status.

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. (17 instances)
    Lines 40-41, Lines 42-44, Lines 45-46, Lines 47-49, Lines 50-51, Lines 52-53, Lines 54-55, Lines 56-57, Lines 58-59, Lines 60-61, Lines 62-63, Lines 64-65, Lines 66-67, Lines 72-73, Lines 74-75, Lines 76-77, Lines 81-82
  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. (4 instances)
    Line 38, Line 376, Line 1203, Line 1429
  4. If a table has two or more rows or columns that serve as headers, use structural markup to identify their hierarchy and relationship. (8 instances)
    Line 70, Line 38, Lines 90-92, Line 88, Line 376, Line 1203, Line 1429, Line 102
  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.

If the Priority 1 issues listed do not apply to your page, then it qualifies as Bobby Approved and you are entitled to use the Bobby Approved icon. To obtain the icon and learn how to place it in your page, visit the Icon Guidelines page on the CAST web site.


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. (399 instances)
    Line 37, Line 86, Line 94, Line 107, Line 108, Line 110, Line 113, Line 115, Line 117, Line 122, Line 123, Line 127, Line 128, Line 131, Line 132, Line 139, Line 141, Line 143, Line 145, Line 147, Line 149, Line 151, Line 153, Line 155, Line 157, Line 159, Line 161, Line 163, Line 165, Line 167, Line 169, Line 171, Line 173, Line 175, Line 177, Line 179, Line 181, Line 183, Line 185, Line 186, Line 188, Line 189, Line 190, Line 192, Line 193, Line 195, Line 197, Line 199, Line 201, Line 202, Line 204, Line 207, Line 209, Line 211, Line 213, Line 215, Line 217, Line 219, Line 222, Line 224, Line 226, Line 228, Line 230, Line 232, Line 234, Line 236, Line 239, Line 241, Line 242, Line 244, Line 247, Line 251, Line 252, Line 254, Line 256, Line 258, Line 269, Line 287, Line 293, Line 308, Line 310, Line 322, Line 334, Line 345, Line 357, Line 368, Line 399, Line 403, Line 414, Line 419, Line 420, Line 469, Line 470, Line 475, Line 476, Line 483, Line 484, Line 492, Line 493, Line 496, Line 501, Line 506, Line 509, Line 513, Line 516, Line 520, Line 523, Line 526, Line 528, Line 531, Line 534, Line 537, Line 540, Line 543, Line 546, Line 548, Line 550, Line 552, Line 554, Line 556, Line 558, Line 560, Line 562, Line 563, Line 565, Line 567, Line 569, Line 571, Line 572, Line 574, Line 576, Line 578, Line 580, Line 582, Line 584, Line 586, Line 588, Line 590, Line 592, Line 594, Line 596, Line 598, Line 600, Line 602, Line 604, Line 605, Line 607, Line 609, Line 611, Line 613, Line 614, Line 616, Line 618, Line 620, Line 622, Line 624, Line 628, Line 631, Line 632, Line 634, Line 636, Line 639, Line 640, Line 643, Line 644, Line 647, Line 660, Line 668, Line 679, Line 681, Line 689, Line 701, Line 703, Line 714, Line 724, Line 726, Line 732, Line 734, Line 755, Line 756, Line 767, Line 768, Line 771, Line 773, Line 781, Line 783, Line 790, Line 792, Line 799, Line 801, Line 807, Line 808, Line 812, Line 814, Line 821, Line 825, Line 830, Line 832, Line 839, Line 846, Line 861, Line 863, Line 878, Line 887, Line 889, Line 899, Line 900, Line 911, Line 915, Line 923, Line 925, Line 938, Line 939, Line 942, Line 944, Line 958, Line 965, Line 967, Line 974, Line 976, Line 986, Line 988, Line 997, Line 999, Line 1012, Line 1014, Line 1024, Line 1025, Line 1034, Line 1036, Line 1044, Line 1046, Line 1057, Line 1063, Line 1073, Line 1075, Line 1082, Line 1085, Line 1087, Line 1091, Line 1092, Line 1101, Line 1103, Line 1116, Line 1118, Line 1126, Line 1127, Line 1131, Line 1132, Line 1140, Line 1142, Line 1147, Line 1153, Line 1167, Line 1175, Line 1189, Line 1191, Line 1206, Line 1207, Line 1211, Line 1212, Line 1216, Line 1217, Line 1221, Line 1222, Line 1227, Line 1233, Line 1234, Line 1235, Line 1237, Line 1238, Line 1243, Line 1244, Line 1245, Line 1247, Line 1248, Line 1253, Line 1254, Line 1255, Line 1257, Line 1258, Line 1263, Line 1264, Line 1265, Line 1269, Line 1271, Line 1272, Line 1274, Line 1275, Line 1280, Line 1282, Line 1283, Line 1285, Line 1286, Line 1291, Line 1293, Line 1294, Line 1296, Line 1297, Line 1302, Line 1303, Line 1304, Line 1306, Line 1307, Line 1312, Line 1313, Line 1314, Line 1316, Line 1317, Line 1322, Line 1323, Line 1324, Line 1326, Line 1327, Line 1332, Line 1338, Line 1340, Line 1341, Line 1343, Line 1344, Line 1349, Line 1350, Line 1351, Line 1353, Line 1354, Line 1359, Line 1366, Line 1367, Line 1368, Line 1370, Line 1371, Line 1376, Line 1377, Line 1378, Line 1380, Line 1381, Line 1386, Line 1388, Line 1389, Line 1391, Line 1392, Line 1399, Line 1400, Line 1404, Line 1405, Line 1408, Line 1414, Line 1420, Line 1433, Line 1434, Line 1438, Line 1439, Line 1443, Line 1444, Line 1452, Line 1453, Line 1457, Line 1458, Line 1462, Line 1463, Line 1467, Line 1468, Line 1472, Line 1473, Line 1477, Line 1478, Line 1482, Line 1483, Line 1487, Line 1488, Line 1492, Line 1493, Line 1497, Line 1498, Line 1502, Line 1503, Line 1507, Line 1508, Line 1514, Line 1515, Line 1519, Line 1522, Line 1523, Line 1524, Line 1526, Line 1528, Line 1529, Line 1533, Line 1534, Line 1538, Line 1541, Line 1542, Line 1543, Line 1545, Line 1547, Line 1548, Line 1553, Line 1554, Line 1555
  2. Use relative sizing and positioning (% values) rather than absolute (pixels). (195 instances)
    Line 38, Line 88, Line 102, Line 107, Line 123, Line 128, Line 132, Line 139, Line 141, Line 143, Line 145, Line 147, Line 149, Line 151, Line 153, Line 155, Line 157, Line 159, Line 161, Line 163, Line 165, Line 167, Line 169, Line 171, Line 173, Line 175, Line 177, Line 179, Line 181, Line 183, Line 185, Line 378, Line 379, Line 380, Line 383, Line 386, Line 389, Line 394, Line 398, Line 402, Line 408, Line 413, Line 418, Line 425, Line 429, Line 433, Line 439, Line 443, Line 447, Line 453, Line 457, Line 461, Line 1205, Line 1207, Line 1210, Line 1212, Line 1215, Line 1217, Line 1220, Line 1222, Line 1227, Line 1228, Line 1229, Line 1230, Line 1233, Line 1234, Line 1235, Line 1236, Line 1238, Line 1243, Line 1244, Line 1245, Line 1246, Line 1248, Line 1253, Line 1254, Line 1255, Line 1256, Line 1258, Line 1263, Line 1264, Line 1265, Line 1266, Line 1269, Line 1271, Line 1272, Line 1273, Line 1275, Line 1280, Line 1282, Line 1283, Line 1284, Line 1286, Line 1291, Line 1293, Line 1294, Line 1295, Line 1297, Line 1302, Line 1303, Line 1304, Line 1305, Line 1307, Line 1312, Line 1313, Line 1314, Line 1315, Line 1317, Line 1322, Line 1323, Line 1324, Line 1325, Line 1327, Line 1332, Line 1333, Line 1334, Line 1335, Line 1338, Line 1340, Line 1341, Line 1342, Line 1344, Line 1349, Line 1350, Line 1351, Line 1352, Line 1354, Line 1359, Line 1361, Line 1362, Line 1363, Line 1366, Line 1367, Line 1368, Line 1369, Line 1371, Line 1376, Line 1377, Line 1378, Line 1379, Line 1381, Line 1386, Line 1388, Line 1389, Line 1390, Line 1392, Line 1555
  3. Make sure that headings are nested properly. (5 instances)
    Line 638, Line 766, Line 937, Line 1125, Line 1403
  4. Make sure event handlers do not require use of a mouse. (6 instances)
    Line 42, Line 47, Line 52, Line 56, Line 60, Line 64

User Checks

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

  1. Mark up quotations with the Q and BLOCKQUOTE elements.

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

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

  4. Avoid using movement in images where possible. (16 instances)
    Lines 40-41, Lines 42-44, Lines 45-46, Lines 47-49, Lines 50-51, Lines 52-53, Lines 54-55, Lines 56-57, Lines 58-59, Lines 60-61, Lines 62-63, Lines 64-65, Lines 66-67, Lines 72-73, Lines 74-75, Lines 76-77
  5. If scripts create pop-up windows or change the active window, ensure that the user is aware this is happening. (1 instance)
    Line 10
  6. Avoid using tables to format text documents in columns unless the table can be linearized. (8 instances)
    Line 70, Line 38, Lines 90-92, Line 88, Line 376, Line 1203, Line 1429, Line 102
  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. (8 instances)
    Line 70, Line 38, Lines 90-92, Line 88, Line 376, Line 1203, Line 1429, Line 102

User Checks

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

  1. Provide abbreviations for long row or column labels. (8 instances)
    Line 70, Line 38, Lines 90-92, Line 88, Line 376, Line 1203, Line 1429, Line 102
  2. Specify a logical tab order among form controls, links and objects.

  3. Consider adding keyboard shortcuts to frequently used links.

  4. Provided a linear text alternative for tables that lay out content in parallel, word-wrapped columns. (8 instances)
    Line 38, Line 70, Line 88, Lines 90-92, Line 102, Line 376, Line 1203, Line 1429

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 11 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 BORDERCOLOR in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 90-92
  2. Unknown attribute WIDTH in element TD. for browser(s): Lynx2.7 (97 instances)
    Line 378, Line 379, Line 380, Line 383, Line 386, Line 389, Line 394, Line 398, Line 402, Line 408, Line 413, Line 418, Line 425, Line 429, Line 433, Line 439, Line 443, Line 447, Line 453, Line 457, Line 461, Line 1205, Line 1210, Line 1215, Line 1220, Line 1227, Line 1228, Line 1229, Line 1230, Line 1233, Line 1234, Line 1235, Line 1236, Line 1243, Line 1244, Line 1245, Line 1246, Line 1253, Line 1254, Line 1255, Line 1256, Line 1263, Line 1264, Line 1265, Line 1266, Line 1269, Line 1271, Line 1272, Line 1273, Line 1280, Line 1282, Line 1283, Line 1284, Line 1291, Line 1293, Line 1294, Line 1295, Line 1302, Line 1303, Line 1304, Line 1305, Line 1312, Line 1313, Line 1314, Line 1315, Line 1322, Line 1323, Line 1324, Line 1325, Line 1332, Line 1333, Line 1334, Line 1335, Line 1338, Line 1340, Line 1341, Line 1342, Line 1349, Line 1350, Line 1351, Line 1352, Line 1359, Line 1361, Line 1362, Line 1363, Line 1366, Line 1367, Line 1368, Line 1369, Line 1376, Line 1377, Line 1378, Line 1379, Line 1386, Line 1388, Line 1389, Line 1390
  3. Unknown attribute NAME in element IMG. for browser(s): Lynx2.7 (7 instances)
    Lines 42-44, Lines 47-49, Lines 52-53, Lines 56-57, Lines 60-61, Lines 64-65, Lines 74-75
  4. Attribute NOSHADE in element HR is assigned an incorrect value. for browser(s): Lynx2.7 (1 instance)
    Line 112
  5. Unknown attribute BGCOLOR in element TABLE. for browser(s): Lynx2.7 (2 instances)
    Line 88, Lines 90-92
  6. Required attribute TYPE is missing from tag SCRIPT for browser(s): HTML4.0 (1 instance)
    Line 10
  7. Unknown attribute BORDERCOLORLIGHT in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 90-92
  8. Unknown attribute BORDERCOLORDARK in element TABLE. for browser(s): Lynx2.7, Navigator4.0, HTML4.0 (1 instance)
    Lines 90-92
  9. Unknown attribute COLS in element TABLE. for browser(s): HTML4.0 (1 instance)
    Lines 90-92
  10. Unknown attribute BGCOLOR in element TD. for browser(s): Lynx2.7 (1 instance)
    Line 94
  11. Unknown attribute ALIGH in element DIV. for browser(s): Lynx2.7, Explorer4.01, Navigator4.0, HTML4.0 (2 instances)
    Line 37, Line 86

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/docs/val.html 92.14 K 25.59
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
Total
109.86 K
30.52
HTTP Request Delays
--
7.50
Total + Delays
--
38.02