function addRemarks(){
	$('overlay').setStyle({display: 'block'});
	new Effect.Opacity('overlay', { from: 0.0, to: 0.7, duration: 0.5 });
	$('open_dialog').setStyle({display: 'block'});
}

function hideOverlay(){
	$('overlay').setStyle({display: 'none'});
	$('open_dialog').setStyle({display: 'none'});
}