Hola
Elalux
Prueba este ejemplo:
Código PHP:
<html>
<head>
<script>
function marcar(obj,chk) {
elem=obj.getElementsByTagName('input');
for(i=0;i<elem.length;i++)
elem[i].checked=chk.checked;
}
</script>
</head>
<body>
<form>
<div>
<input type="checkbox" onclick="marcar(this.parentNode,this)" />
<input type="checkbox" onclick="this.parentNode.getElementsByTagName('input')[0].checked = false" />
<input type="checkbox" onclick="this.parentNode.getElementsByTagName('input')[0].checked = false" />
<input type="checkbox" onclick="this.parentNode.getElementsByTagName('input')[0].checked = false" />
</div>
<div>
<input type="checkbox" onclick="marcar(this.parentNode,this)" />
<input type="checkbox" onclick="this.parentNode.getElementsByTagName('input')[0].checked = false" />
<input type="checkbox" onclick="this.parentNode.getElementsByTagName('input')[0].checked = false" />
<input type="checkbox" onclick="this.parentNode.getElementsByTagName('input')[0].checked = false" />
</div>
<form>
</body>
</html>
Saludos,
