function usermenu()
{
	document.getElementById('usermenu').style.top = document.getElementById('usermenu_link').offsetTop;
	document.getElementById('usermenu').style.right = document.getElementById('usermenu_link').offsetLeft;

	if (document.getElementById('usermenu').style.display == 'block')
		document.getElementById('usermenu').style.display = 'none';
	else
		document.getElementById('usermenu').style.display = 'block';
		
	return false;
}

<a id="usermenu_link" href="#" onClick="javascript:usermenu();">More &dArr;</a>
<div id="usermenu" style="position: absolute; display: none; min-width: 100px; background-color: #CCCCFF; border: 2px outset; text-align: left;">
Some stuff here
</div>