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

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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		over01 = newImage("/images/Bt_VoirTous-over_EN.gif");
		over02 = newImage("/images/bt_Go-over.gif");
		over03 = newImage("/images/Bt_Catalogue-over_EN.gif");
		over04 = newImage("/images/Bt_Busch-over_EN.gif");
		over05 = newImage("/images/Bt_Industries-over_EN.gif");
		over06 = newImage("/images/Bt_Information-over_EN.gif");
		over07 = newImage("/images/Bt_Services-over_EN.gif");
		preloadFlag = true;
	}
}