resetting specified checkboxes

[Fou-Lu]

Alright I'm having problems with resetting specific checkboxes.
I have like so:

<input type="checkbox" name="defcheck" value="yes" CHECKED>
<input type="checkbox" name="checkbox[]" value="1">
<input type="checkbox" name="checkbox[]" value="2" CHECKED>
<input type="checkbox" name="checkbox[]" value="3">
<input type="checkbox" name="checkbox[]" value="4" CHECKED>

So heres what I'm trying to do. Its set so when you check on any check box, it will automatically uncheck the defcheck box. What I want it to do, is when you once again check on the defcheck, it will automatically reset the remainder of the checkboxes back to their original values. Any suggestions?

[glenngv]

Is this enough?

function resetBoxes(obj){
  if (obj.checked){
    var chks = obj.form.elements['checkbox[]'];
    for (var j=0;j<chks.length;j++){
      chks[j].checked = (chks[j].defaultChecked) ? true:false;
    }
  }
}
...
<input type="checkbox" name="defcheck" value="yes" onclick="resetBoxes(this)" CHECKED>
<input type="checkbox" name="checkbox[]" value="1" onclick="this.form.defcheck.checked=false">
<input type="checkbox" name="checkbox[]" value="2" onclick="this.form.defcheck.checked=false" CHECKED>
<input type="checkbox" name="checkbox[]" value="3" onclick="this.form.defcheck.checked=false">
<input type="checkbox" name="checkbox[]" value="4" onclick="this.form.defcheck.checked=false" CHECKED>

[Fou-Lu]

Yeah, just some minor alterations to match, works great!
Thanx glenngv!
BTW, how does that ? true:false work? I mean, what would that be telling the js to do?

[shlagish]

It's an if statement

same as:

if (chks[j].defaultChecked)
{
chks[j].checked = true;
}
else
{
chks[j].checked = false;
}

It's the same, but shorter...

[glenngv]

Correct!

That is called a ternary operator, which can be thought of as a shortcut to an if-else statement.