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<!DOCTYPE html> <html> <head> <style> table, td, th { border: 3px solid red; } #table1 { border-collapse: collapse; border-color: blue; } #table2 { border-collapse: separate; border-color: blue; } </style> </head> <body> <h2>border-collapse: collapse:</h2> <table id="table1"> <tr> <th>Firstname</th> <th>Lastname</th> </tr> <tr> <td>Peter</td> <td>Griffin</td> </tr> <tr> <td>Lois</td> <td>Griffin</td> </tr> </table> <h2>border-collapse: separate:</h2> <table id="table2"> <tr> <th>Firstname</th> <th>Lastname</th> </tr> <tr> <td>Peter</td> <td>Griffin</td> </tr> <tr> <td>Lois</td> <td>Griffin</td> </tr> </table> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/edibu.js"></script> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/tongji.js"></script></body> </html>