In WordPress jQuery.noConflict()
is called on the jQuery file it includes (scroll to the bottom of the file it’s including for jQuery to see this), which means $
doesn’t work, but jQuery
does, so your code should look like this:
<script type="text/javascript">
jQuery(function($) {
for(var i=0; i <= 20; i++)
$("ol li:nth-child(" + i + ")").addClass('olli' + i);
});
</script>