toggle visibility for a DIV

<script language="javascript" type="text/javascript">
function toggleDivOL( elemID )
{    var elem = document.getElementById( elemID );
    if( elem.style.display != 'none' )
        {        elem.style.display = 'none';
        }
            else
        {        elem.style.display = 'block';
        }
}
</script>

 

you can call this function like this

onclick=toggleDivOL('elemID')

replace elemID with the id you want to toggle the visibility