网上好多代码都是错的
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<script src="jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#checkedAll").click(function () {
//alert("aa");
if ($(this).attr("checked")) { // 全选
$("input[name='checkbox_name']").each(function () {
$(this).attr("checked", true);
});
}
else { // 取消全选
$("input[name='checkbox_name']").each(function () {
$(this).attr("checked", false);
});
}
});
});
</script>
<body>
<input type="checkbox" name="checkbox_name" id="checkbox_name_1" />1<br />
<input type="checkbox" name="checkbox_name" id="checkbox_name_2" />2<br />
<input type="checkbox" name="checkbox_name" id="checkbox_name_3" />3<br />
<input type="checkbox" name="checkbox_name" id="checkbox_name_4" />4<br />
<input type="checkbox" name="checkedAll" id="checkedAll"/>全选/取消全选
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<script src="jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#checkedAll").click(function () {
//alert("aa");
if ($(this).attr("checked")) { // 全选
$("input[name='checkbox_name']").each(function () {
$(this).attr("checked", true);
});
}
else { // 取消全选
$("input[name='checkbox_name']").each(function () {
$(this).attr("checked", false);
});
}
});
});
</script>
<body>
<input type="checkbox" name="checkbox_name" id="checkbox_name_1" />1<br />
<input type="checkbox" name="checkbox_name" id="checkbox_name_2" />2<br />
<input type="checkbox" name="checkbox_name" id="checkbox_name_3" />3<br />
<input type="checkbox" name="checkbox_name" id="checkbox_name_4" />4<br />
<input type="checkbox" name="checkedAll" id="checkedAll"/>全选/取消全选
</body>
</html>