mootools changing an elements inline css
- by sea_1987
I have some HTML that looks like this,
<div id="mb_contents" style="visibility: visible; opacity: 1; width: 600px; height: 450px;">
I am trying to turn the visibilty to hidden using this js/mootools, 
$('mb_overlay').set('styles', {
            'visibilty': 'hidden',
        });
However nothing seems to be working, am I missing something?