cant open the dropdown menue in asp.net mvc

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Razor

i have accessed all my css and javascript files in my _Layout.cshtml page in my mvc project. i have created another index.cshtml page and put all the dropdown html code in that index.cshtml page. but when i debug my project it takes all the css classes and javascript classes but doesnt take the dropdown file classes. here is the syntax i used in _Layout.cshtml pages in head tag;
<script src="../javascript/headerScript.js" type="text/javascript"></script>
and in index.cshtml page i just used the html code.

<ul class="columnOne solutionsColumnOne">
                                       <li id="listItem1"><a href="#">Software</a></li>
                                       <li id="listItem2"><a href="#">Website</a></li>
                                       <li id="listItem3"><a href="#">Shoping Carts</a></li>
                                       <li id="listItem4"><a href="#">Graphic Designing</a></li>
                                       <li id="listItem5"><a href="#">Mobile Apps</a></li>
                                       <li id="listItem6"><a href="#">Infrastructure</a></li>
                                       <li id="listItem7"><a href="#">Technical Support</a></li>
                                       <li id="listItem8"><a href="#">IT Governance</a></li>
                                       <li id="listItem9"><a href="#">VOIP Solution</a></li>
                                           </ul>

kindly tell me what is missing, OR is there any alternative to get the classes of that js file.