var n = 0;
var ImgDiapoInstallation = new Array();

ImgDiapoInstallation[0] = "images_installations/img01.jpg";
ImgDiapoInstallation[1] = "images_installations/img02.jpg";
ImgDiapoInstallation[2] = "images_installations/img03.jpg";
ImgDiapoInstallation[3] = "images_installations/img04.jpg";
ImgDiapoInstallation[4] = "images_installations/img05.jpg";
ImgDiapoInstallation[5] = "images_installations/img06.jpg";
ImgDiapoInstallation[6] = "images_installations/img07.jpg";
ImgDiapoInstallation[7] = "images_installations/img08.jpg";
ImgDiapoInstallation[8] = "images_installations/img09.jpg";
ImgDiapoInstallation[9] = "images_installations/img10.jpg";

var NbrImgInstallation = (ImgDiapoInstallation.length - 1);

function Diapo_installation(d) {
	n = n + d;
	if (n < 0) {
		n = NbrImgInstallation;
	}
	if (n > NbrImgInstallation) {
		n = 0;
	}
	document.img.src = ImgDiapoInstallation[n];
}