How to add auto navbar expand on mouse hover? on this site

this is the website I’m developing now I have a problem with how to auto navbar expand on mouse hover on this site can you guys inspect it and tell me what to do or what to add, thank you

how to set navbar auto-expand on mouse hover

>Solution :

Here is one item of the menu. Try this:

.dropdown-menu.multi-level {
    display: none;
.nav.navbar-nav li:hover ul {
    display: block  
<ul class="nav navbar-nav">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Admission <b class="caret"></b></a>
        <ul class="dropdown-menu multi-level">
            <li><a href="btech_admission.html">B.Tech</a></li>
            <li><a href="mtech_admission.html">M.Tech</a></li>
            <li><a href="phd_admission.html">Ph.D</a></li>

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