I have this code on two pages on my site, but at one page the function doesn't work. Firebug shows me " $(...).tabs is not a function ". I don't understand why, can anyone tell me what is wrong ?
this is working: http://www.invat-online.net/variante-rezolvate
this is not working: http://www.invat-online.net/variante-explicate-limba-romana/varianta-01
Here is the code:
<div id="tabss">
    <ul>
        <li><a href="#SubiectI">Subiect I</a></li>
        <li><a href="#SubiectII">Subiect II</a></li>
        <li><a href="#SubiectIII">Subiect III</a></li>
    </ul>
    <div id="SubiectI">content here</div>
    <div id="SubiectII">content here</div>
    <div id="SubiectIII">content here</div>
</div>
$(document).ready(function() {
   $("#tabss").tabs();
});
 
     
     
     
     
     
     
     
     
    