<div id="bar-transition">
<script type="text/javascript">
function menu-iluminate-over() {
document.getElementById("menu-bar").src="menu-light.png";
}
function menu-iluminate-out() {
document.getElementById("menu-bar").src="menu.png";
}
</script>
<img id="menu-bar" src="menu.png" title="Categorías" onmouseover="menu-iluminate-over()" onmouseout="menu-iluminate-out()" style="
cursor: pointer;
float: left;
position: absolute;
top: 12px;
left: 100px;
">
</div>