====== Get element position in browser with JavaScript ======
If you use table cells as menu buttons and autosize them,  this code finds the left position of element with id 'menubutton', and then places element with id 'menubody' to the same left position:
<code javascript>
var mbtn = document.getElementById('menubutton').getBoundingClientRect();
var mbody = document.getElementById('menubody');
mbody.style.left = mbtn.left+'px';
</code>
Or using jQuery
<code javascript>
var newLeft = $('#menubutton').offset().left;
$('#menubody').css('left',newLeft);
</code>