var Timer;
var Pas = 1;

function moveLayer(Sens)
{
    //if(document.getElementById)
		Objet = document.getElementById("Contenu");
	//else
	   //Objet = document.all["Contenu"];
	   //	document.getElementById("top").innerHTML = parseInt(get_full_position('Contenu')-200);

	if( parseInt(Objet.style.top) <= -(get_full_position('Contenu')-202) ) {
		Objet.style.top = -(get_full_position('Contenu')-202)+"px";
	}
	if(parseInt(Objet.style.top) + (Pas*Sens) > 0 ) {
		Objet.style.top = "0px";
	}
	else {
		Objet.style.top = (parseInt(Objet.style.top) + (Pas*Sens)) + "px";
		//document.getElementById("top").innerHTML = (parseInt(Objet.style.top) + (Pas*Sens)) + "px";
	}
	Timer = setTimeout("moveLayer(" + Sens + ");", 10);
}


function get_offset(elem, pos)
{
    var offset = 0;
    while(elem) {
        offset += elem[pos];
        elem = elem.offsetParent
    }
    return offset
}

function get_full_position(id)
{
    var d = document.getElementById(id);
    var offsets = new Object;
    offsets.top = get_offset(d, "offsetTop");
    offsets.left = get_offset(d, "offsetLeft");
    offsets.width = d.clientWidth;
    offsets.height = d.clientHeight;
    return( offsets.height );
}
function affiche() {
		get_full_position('Contenu');
}