<!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>Untitled Document</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<label> Vives con tu Familia<br />
</label>
<p>
<label>
<input type="checkbox" name="RadioGroup1" value="1" id="si" onclick="Si()"/>
si</label>
<br />
<label>
<input type="checkbox" name="RadioGroup1" value="2" id="no" onclick="No()"/>
no</label>
<br />
<br />
</p>
<label></label>
<p>
<label>Mama
<input type="checkbox" name="mama" id="mama" disabled="disabled"/>
</label>
<label>
<input type="checkbox" name="amigos" id="amigos" disabled="disabled"/>
amigos</label>
</p>
<p>papa
<label>
<input type="checkbox" name="papa" id="papa" disabled="disabled"/>
</label>
<label>
<input type="checkbox" name="otros" id="otros" disabled="disabled"/>
otros</label>
</p>
<p>Hijos
<label>
<input type="checkbox" name="hijos" id="hijos" disabled="disabled"/>
</label>
</p>
<p>
<label
</label>
</p>
</form>
</body>
</html>
<script>
var si=document.getElementById ( "si" )
var no=document.getElementById ( "no" )
var m=document.getElementById ( "mama" )
var p=document.getElementById ( "papa" )
var h=document.getElementById ( "hijos" )
var a=document.getElementById ( "amigos" )
var o=document.getElementById ( "otros" )
function Si()
{
m.disabled= false
p.disabled= false
h.disabled= false
a.disabled= true
o.disabled= true
a.checked=false
o.checked=false
no.checked=false
}
function No()
{
m.disabled= true
p.disabled= true
h.disabled= true
a.disabled= false
o.disabled= false
m.checked=false
p.checked=false
h.checked=false
si.checked=false
}
</script>
y este Ejemplo es con check como quieres. suerte.