function getElement( elementId )  {
          var elem;

        if( document.getElementById ) // standard
                elem = document.getElementById( elementId );
        else if( document.all ) // Old MSIE
                elem = document.all[elementId];
        else if( document.layers ) // NN4
                elem = document.layers[elementId];

        return elem;
}

function display( obj_id, display )  {
	var elem = getElement( obj_id );

	if (display)
		elem.style.display = 'inline';
	else
		elem.style.display = 'none';
	
}