Вариант с подсветкой...
<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE></TITLE>
<style>
.off {
border: 1px solid;
}
.on {
border: 1px solid;
border-right: 3px solid;
border-bottom: 3px solid;
background-color: silver;
}
</style>
<script>
</script>
</HEAD>
<BODY>
<br />
<div class='off' onmouseover='this.className="on"' onmouseout='this.className="off"' style="width: 160px; height: 20px; overflow: hidden;" id="foto_form_div">
<a class="addm" href="#" id="foto_upload_link">Загрузить фото</a>
<input
type="file" id="foto_upload" name="foto_upload"
style="font-size: 30px; width: 160px; opacity: 0; filter:alpha(opacity: 0); position: relative; top: -40px;; left: 0px"
/>
</div>
</BODY>
</HTML>