JS案例五：设置全选、全不选以及反选
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2022-05-29 13:26:11
``` 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>