x
<html><head><style>table, th, td { border: 1px solid black; border-collapse: collapse;}</style></head><body><h2>Hide Columns</h2><p>You can hide specific columns with the visibility property:</p><table style="width: 100%;"><colgroup> <col span="2"> <col span="3" style="visibility: collapse"> </colgroup><tr><th>MON</th><th>TUE</th><th>WED</th><th>THU</th><th>FRI</th><th>SAT</th><th>SUN</th></tr><tr><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td><td>7</td></tr><tr><td>8</td><td>9</td><td>10</td><td>11</td><td>12</td><td>13</td><td>14</td></tr><tr><td>15</td><td>16</td><td>17</td><td>18</td><td>19</td><td>20</td>