Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as range.
A <table> contains an incoherent number of columns on one of its rows. Check the structure of the table to find the invalid row.
For example, in the following table, the first <tr> row defines that it’s 2 columns wide, but the second <tr> row tries to use 5 columns by means of a colspan attribute:
<table> <!-- This first row sets the table as 2 columns wide --> <tr> <td>First</td> <td>Second</td> </tr> <!-- This second row tries to use 5 columns --> <tr> <td colspan="5">Wrong</td> </tr> </table>
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