JS 實現表單 全選和全不選
阿新 • • 發佈：2018-10-31
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script> function checkAll(){ var cb = document.getElementById("cb1"); if(cb.checked==true){ var checkbox1 = document.getElementsByName("checkbox1"); for(var i=0;i<checkbox1.length;i++){ checkbox1[i].checked=true; } }else{ var checkbox1 = document.getElementsByName("checkbox1"); for(var i=0;i<checkbox1.length;i++){ checkbox1[i].checked=false; } } } </script> </head> <body> <table border="1px"style="margin: auto;"> <tr> <th> <input type="checkbox" id="cb1" onclick="checkAll()"/> </th> <th>id</th> <th>name</th> <th>age</th> </tr> <tr> <td> <input type="checkbox" name="checkbox1"/> </td> <td>1</td> <td>tom</td> <td>21</td> </tr> <tr> <td> <input type="checkbox" name="checkbox1"/> </td> <td>2</td> <td>jack</td> <td>22</td> </tr> <tr> <td> <input type="checkbox" name="checkbox1"/> </td> <td>3</td> <td>lucy</td> <td>23</td> </tr> </table> </body> </html>