_andrea.l wrote:
I have n checkboxes and 1 checkbox 'SELECT ALL'.
for example:
<form action="" method="get">
<input name="sa" type="checkbox" value="v"> select all
<input name="c1" type="checkbox" value="v"> option 1
<input name="c2" type="checkbox" value="v"> option 2
<input name="c3" type="checkbox" value="v"> option 3
...
<input name="cn" type="checkbox" value="v"> option n
</form>
I'd like check all checkboxes when I select 'sa' (select all) and deselect
all boxes when I select one checkbox (less the checkbox I had selected)
How can I do that?
<script type="text/javascript">
function checkAll( el, tick ) {
var els = el.form.elements;
var x, i = els.length;
while ( i-- ) {
x = els[i];
if ( 'input' == x.nodeName.toLowerCase() &&
'checkbox' == x.type ) {
x.checked = tick;
}
}
}
function checkThis( el ) {
checkAll( el, false );
el.checked = true;
}
</script>
<form action="">
<input name="sa" type="checkbox" value="v" onclick="
checkAll(this, true);
"> select all<br>
<input name="c1" type="checkbox" value="v" onclick="
checkThis(this);
"> option 1<br>
<input name="c2" type="checkbox" value="v" onclick="
checkThis(this);
"> option 2<br>
<input name="c3" type="checkbox" value="v" onclick="
checkThis(this);
"> option 3<br>
<input name="cn" type="checkbox" value="v" onclick="
checkThis(this);
"> option n<br>
<input type="reset">
</form>
--
Rob
