Check/Uncheck all checkboxes with Javascript in a PHP array with keys - php

Question

I have the following code:
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Uncheck All |
Invert Selection<br />
<table>
<tr>
<td><input type="checkbox" name="names[8]" value="yes" />Paul</td>
<td><input type="checkbox" name="names[11]" value="yes" />Bob</td>
<td><input type="checkbox" name="names[44]" value="yes" />Tom</td>
</tr>
</table>
And the following script:
function setCheckboxes3(act)
{
elts = document.getElementsByName("names[]");
var elts_cnt = (typeof(elts.length) != 'undefined') ? elts.length : 0;
if (elts_cnt)
{
for (var i = 0; i < elts_cnt; i++)
{
elts[i].checked = (act == 1 || act == 0) ? act : (elts[i].checked ? 0 : 1);
}
}
}
The script is working with other arrays without keys, but I can't get it to work with this array which has keys.
Thanks in advance

Answer 1

You can use getElementsByClassName:
<script type="text/javascript" language="javascript">
function setCheckboxes3(act) {
var e = document.getElementsByClassName('names');
var elts_cnt = (typeof(e.length) != 'undefined') ? e.length : 0;
if (!elts_cnt) {
return;
}
for (var i = 0; i < elts_cnt; i++) {
e[i].checked = (act == 1 || act == 0) ? act : (e[i].checked ? 0 : 1);
}
}
</script>
Check All |
Uncheck All |
Invert Selection<br />
<input type="checkbox" name="names[8]" class="names" value="yes" />Paul
<input type="checkbox" name="names[11]" class="names" value="yes" />Bob
<input type="checkbox" name="names[44]" class="names" value="yes" />Tom
OR you can use: getElementsByTagName
<script type="text/javascript" language="javascript">
function setCheckboxes3(act) {
var e = document.getElementsByTagName('input');
var elts_cnt = (typeof(e.length) != 'undefined') ? e.length : 0;
if (!elts_cnt) {
return;
}
for (var i = 0; i < elts_cnt; i++) {
if((e[i].type) == 'checkbox') {
e[i].checked = (act == 1 || act == 0) ? act : (e[i].checked ? 0 : 1);
}
}
}
</script>
Check All |
Uncheck All |
Invert Selection<br />
<input type="checkbox" name="names[8]" value="yes" />Paul
<input type="checkbox" name="names[11]" value="yes" />Bob
<input type="checkbox" name="names[44]" value="yes" />Tom
Did you get a chance to try jQuery?