一个全选按钮js的案例
<html>
<head>
<script type="text/javascript">
// 全选按钮选中标志
var checkflag = "false";
// 全选功能
function selectAll(name){
var field = document.getElementsByName(name);
// 如果全选按钮状态是未选中
if (checkflag == "false"){
for (i = 0; i < field.length; i++){
field[i].checked = true;
}
// 更改全选按钮选中标志
checkflag = "true";
}else{
for (i = 0; i < field.length; i++){
field[i].checked = false;
}
// 更改全选按钮选中标志
checkflag = "false";
}
}
</script>
</head>
<body>
<form name="form" method="post" action="">
<table>
<tr>
<td>
<input type="checkbox" value="全选" onClick="selectAll('list')">选中所有显示记录
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="list" value="1" >
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="list" value="2">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="list" value="3">
</td>
</tr>
</table>
</form>
</body>
</html>
