<!DOCTYPE html> <meta charset=utf-8> <title>Table borders</title> <table border> <tr><td>Test </table> <table border=""> <tr><td>Test </table> <table border=null> <tr><td>Test </table> <table border=undefined> <tr><td>Test </table> <table border=foo> <tr><td>Test </table> <table border=1> <tr><td>Test </table> <table border=1foo> <tr><td>Test </table> <table border=1%> <tr><td>Test </table> <table border=-1> <tr><td>Test </table> <table border=-1foo> <tr><td>Test </table> <table border=-1%> <tr><td>Test </table>