So, I've got this:
<ul class="fade">
   <li>Hello</li>
   <li>I am mahdi khaksar from iran</li>
   <li>I am designer and programmer at progpars.com </li>
   <li>www.ijquery.ir</li>
</ul>
<script src="https://www.datastreak.org/js/jquery.js"></script>
<script src="https://www.datastreak.org/js/inewsticker.js"></script>
<script>
   $(document).ready(function() {
       $('.fade').inewsticker({
        speed       : 3000,
        effect      : 'fade',
        dir         : 'ltr',
        font_size   : 13,
        color       : '#000',
        font_family : 'arial',
        delay_after : 1000      
    });
   });  
</script>
In a standalone HTML file, it works perfectly. But when I add it to our main site, I get this:

What am I missing here?
                        
It was indeed a JS conflict. There was no problem with the code, the problem is now fixed.