How to set tabindex for elements on webpage with similar class using jquery

I have multiple elements with anchor tag as below, I am trying to set tabindex only to elements with the anchor tag. Below is the code:

<ul class="level1 static" tabindex="0" role="menu" style="position: relative; width: auto; float: left;">

        <li role="menuitem" class="static" style="position: relative;">
        <a class="level1 static" >program details<span class="visuallyhidden">(Current page)</span></a>
</ul>

Thanks in Advance!