<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script>
function checkAll(obj,names){
var checkboxs = document.getElementsByName(names);
for(var i=0;i<checkboxs.length;i++){checkboxs[i].checked = obj.checked;}
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="manage.php">
<table width="100%">
<tr>
<td>
<input type="checkbox" name="checkbox[]" value="a" />甲类
<input type="checkbox" name="checkbox[]" value="b" />乙类
<input type="checkbox" name="checkbox[]" value="c" />丙类
</td>
</tr>
<tr>
<td><input type="checkbox" name="pointall" onclick="checkAll(this,'checkbox[]')" />全选/取消</td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="提交" /></td>
</tr>
</table>
</form>
</body>
</html>
效果图：
<?php print_r($_POST[checkbox]); ?>
效果图：
PS：兼容IE6+，火狐 ，谷歌，欧朋