function Menu( o )
{
	o.parentNode.firstChild.checked = true;

	ao_input = document.getElementById( 'hd_menu' ).getElementsByTagName( 'input' );
	ao_anchor = document.getElementById( 'hd_menu' ).getElementsByTagName( 'a' );
	for ( n_Index = 0; n_Index < ao_input.length; ++n_Index )
	{
		if ( ao_input[ n_Index ].checked )
		{
			document.getElementById( ao_input[ n_Index ].value ).style.display = 'block';
			ao_anchor[ n_Index ].style.textDecoration = 'underline';
		}
		else
		{
			document.getElementById( ao_input[ n_Index ].value ).style.display = 'none';
			ao_anchor[ n_Index ].style.textDecoration = 'none';
		}
	}
}