Show hide function

<script type="text/javascript">
<!--

function showhide(id) {
var e = document.getElementById(id);
if(e.style.display == 'none')
e.style.display = 'block';
else
e.style.display = 'none';
}
//-->
</script>

<a href="#" onclick="showhide('weak');" style="">show</a>
<div id="weak" style="display:none;etc">txt/img/obj</div>