if (document.images) 
	{
	infobutton1 = new Image 
	infobutton2 = new Image
 	fotobutton1 = new Image 
	fotobutton2 = new Image
	infobutton1.src = 'images/btn_info.png' 
	infobutton2.src = 'images/btn_info_a.png'
 	fotobutton1.src = 'images/btn_fotos.png' 
	fotobutton2.src = 'images/btn_fotos_a.png'
	}