Hola, aqui te propongo una modificacion
Código PHP:
function checkChoice(field, i) {
if (i == 0) { // "All" checkbox selected.
if (field[0].checked == true) {
for (j = 1; j < field.length; j++)
field[j].checked = false;
}
}
else {
if (field[i].checked == true) {
field[0].checked = false;
}
}
}
y el codigo HTML:
Código HTML:
<form name="form">
<input type="checkbox" name="mode[]" value="*" checked="checked" onclick="checkChoice(document.form, 0)">Todo
<input type="checkbox" name="mode[]" value="one" onclick="checkChoice(document.form, 1)">Uno
<input type="checkbox" name="mode[]" value="two" onclick="checkChoice(document.form, 2)">Dos</td>
<input type="checkbox" name="mode[]" value="three" onclick="checkChoice(document.form, 3)">Tres
</form>
Saludos.