function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

<!--

if (document.images)
{
preload_image_object = new Image();
// set image url
image_url = new Array();
image_url[0] = "../images/Menu/NotreSavoirFaireOver.png";
image_url[1] = "../images/Menu/LaSocieteOver.png";
image_url[2] = "../images/Menu/ContactOver.png";

var i = 0;
for(i=0; i<=3; i++) 
preload_image_object.src = image_url[i];
}

//-->