You missed text-decoration:none
for the anchor tag. So code should be following.
.boxhead a {_x000D_
text-decoration: none;_x000D_
}
_x000D_
<div class="boxhead">_x000D_
<h2>_x000D_
<span class="thisPage">Current Page</span>_x000D_
<a href="myLink"><span class="otherPage">Different Page</span></a>_x000D_
</h2>_x000D_
</div>
_x000D_
More standard properties for text-decoration