html 컬럼, 로우 합치기 (colspan, rowspan)

<h1>2개의 컬럼(td) 합치기</h1><table border="1"> <tr> <th>Name</th> <th colspan="3">Tell1</th> </tr> <tr> <td>Bill Gates</td> <td>555 77 845</td> <td>555 77 845</td> <td>555 77 845</td> </tr></table> <h1>2개의 로우(td) 합치기</h1><table border="1"> <tr> <th>Name</th> <th>Bill Gates</th> </tr> <tr> <td rowspan="2">Tel</td> <td>555 77 845</td> </tr> <tr> <td>555 77 845</td&g..........