function show_dlang_submenu() {
	var pobj = $('clang').getCoordinates();
	var smenu = document.getElementById('dlang_sub');
	if(smenu.style.visibility=='visible') {
		smenu.style.visibility='hidden';
	} else {
		smenu.style.visibility='visible';
		$('dlang_sub').addEvent('mouseleave', close_lmenu);
	}
	var scoords = $('dlang_sub').getCoordinates();
	smenu.style.top=(pobj.top-scoords.height+pobj.height+2)+'px';
	smenu.style.left=(pobj.left-5)+'px';
	return false;
}
function close_lmenu() {
	document.getElementById('dlang_sub').style.visibility='hidden';
}