JSSOR "Error: prototype of 'thumbnavigator' not defined" -

the full javascript error is: timestamp: 6/4/2015 8:52:37 error: error: prototype of 'thumbnavigator' not defined. source file: http://webanautics.com/invoice/slider-master/js/jssor.js line: 69

i have read other answers same question, answers don't work particular code.

i'm using tabs-slider example, enter link description here

my slides container looks this:

    <!-- slides container -->     <div u="slides" style="cursor: move; position: absolute; left: 0px; top: 29px; width: 900px; height: 600px; border: 1px solid gray; -webkit-filter: blur(0px); background-color: #fff; overflow: hidden;">         <div>             <div style="margin: 10px; overflow: hidden; color: #000;">             <?php $week = -1; include("includes/invoice-week-module.php"); ?>             </div>             <div u="thumb">last week</div>         </div>         <div>             <div style="margin: 10px; overflow: hidden; color: #000;">             <?php $week = 0; include("includes/invoice-week-module.php"); ?>             </div>             <div u="thumb">this week</div>         </div>         <div>             <div style="margin: 10px; overflow: hidden; color: #000;">             <?php $week = 1; include("includes/invoice-week-module.php"); ?>             </div>             <div u="thumb">next week</div>         </div>     </div> 

this thumbnavigator div block:

    <div u="thumbnavigator" class="jssort12" style="left:0px; top: 0px;">         <!-- thumbnail item skin begin -->         <div u="slides" style="cursor: default; top: 0px; left: 0px; border-left: 1px solid gray;">             <div u="prototype" class="p">                 <div class=w><div u="thumbnailtemplate" class="c"></div></div>             </div>         </div>         <!-- thumbnail item skin end -->     </div>     <!--#endregion thumbnailnavigator skin end --> 

when error happens, other javascript afterwards doesn't work.