ns4 = (document.layers)? true:false;
ie4 = (document.all)? true:false;

if (ie4) {
	document.write("<div id='flottant' style='position: absolute; top: 200px; left: 200px; z-index: 10;'><img src='../media/javascript/0.gif'></div>");
	}
if (ns4) {
	document.write("<layer top='200px' left='200px' name='flottant'><img src='../media/javascript/0.gif'></layer>");
	}
immobile();

function immobile() {
	if (ie4) {
		flottant.style.pixelTop = document.body.scrollTop + 200;
		}
	if (ns4) {
		document.flottant.top = window.pageYOffset + 200;
		}
	setTimeout("immobile()",0);
	}