var nb_pix_4_3=0,var nb_pix_5_4=0,var nb_pix_16_10=0;

function best_resolution(nb_pix_4_3,nb_pix_5_4,nb_pix_16_10) {
	var largeur=screen.width;
	var hauteur=screen.height;
	var ratio_ecran=largeur / hauteur;
	
	switch(ratio_ecran) {
		case 4/3:
			if(nb_pix_4_3 > 0) { return nb_pix_4_3; }
			else if(nb_pix_4_3 = 0) and (nb_pix_5_4 > 0) { return nb_pix_5_4; }
			else if(nb_pix_4_3 == 0) and (nb_pix_5_4 == 0) and (nb_pix_16_10 > 0) { return nb_pix_16_10; }
		break;
		case 5/4:
			if(nb_pix_5_4 > 0) { return nb_pix_5_4; }
			else if(nb_pix_5_4 = 0) and (nb_pix_4_3 > 0) { return nb_pix_4_3; }
			else if(nb_pix_5_4 == 0) and (nb_pix_4_3 == 0) and (nb_pix_16_10 > 0) { return nb_pix_16_10; }
		break;
		case 5/4:
			if(nb_pix_5_4 > 0) { return nb_pix_5_4; }
			else if(nb_pix_5_4 = 0) and (nb_pix_4_3 > 0) { return nb_pix_4_3; }
			else if(nb_pix_5_4 == 0) and (nb_pix_4_3 == 0) and (nb_pix_16_10 > 0) { return nb_pix_16_10; }
		break;

		
	}
}

function resolution_image(lien,nb_pix_4_3,nb_pix_5_4,nb_pix_16_10) {
	if(nb_pix_4_3 > 0) { return lien + "/" + nb_pix_4_3 + "/"; }
	else if(nb_pix_4_3 = 0) and (nb_pix_5_4 > 0) { return lien + "/" + nb_pix_5_4 + "/"; }
	else if(nb_pix_4_3 == 0) and (nb_pix_5_4 == 0) and (nb_pix_16_10 > 0) { return lien + "/" + nb_pix_16_10 + "/"; }
}