JS案例五:设置全选、全不选以及反选
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2023-09-28 15:51:28
``` 全选和全不选以及反选 全选 编号姓名年龄 1张三12 2李四22 3王五13 4马六14 ... ......
<!doctype html> <html> <head> <meta charset="utf-8"> <title>全选和全不选以及反选</title> <script> window.onload = function() { var checkedall = document.getelementbyid("checkedall"); var checkedone = document.getelementsbyname("checkedone"); //全选和全不选事件 checkedall.onclick = function() { if(checkedall.checked == true){ for(var i = 0;i<checkedone.length;i++) { checkedone[i].checked = true; } }else { for(var i = 0;i<checkedone.length;i++) { checkedone[i].checked = false; } } } //反选事件 document.getelementbyid("reselect").onclick = function() { for(var i =0;i<checkedone.length;i++) { checkedone[i].checked = !checkedone[i].checked; } } } </script> </head> <body> <table id="tbl" border="1" border-collapse="collapse" align="center" cellspacing="0" cellpadding="5" width="400" height="20"> <thead> <tr> <th><input type = "checkbox" id="checkedall">全选</input></th> <th>编号</th><th>姓名</th><th>年龄</th> </tr> </thead> <tbody> <tr> <td><input type="checkbox" name="checkedone"/></td> <td>1</td><td>张三</td><td>12</td> </tr> <tr> <td><input type="checkbox" name="checkedone"/></td> <td>2</td><td>李四</td><td>22</td> </tr> <tr> <td><input type="checkbox" name="checkedone" /></td> <td>3</td><td>王五</td><td>13</td> </tr> <tr> <td><input type="checkbox" name="checkedone"/></td> <td>4</td><td>马六</td><td>14</td> </tr> <tr> <td><input type="checkbox" name="checkedone"/></td> <td>5</td><td>伍六七</td><td>17</td> </tr> <tr> <td><input type="checkbox" name="checkedone"/></td> <td>6</td><td>梅花十三</td><td>17</td> </tr> <tr> <td colspan=4><input type="button" value="反选" id="reselect" /></td> </tr> </tbody> </table> </body> </html>
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