var speed=5;

function up(val){
	crossobj=document.getElementById('conteneur'+val);
	contentheight=crossobj.offsetHeight;
	crossobj.style.top="0px";
}

function moveup(val){
	crossobj=document.getElementById('conteneur'+val);
	contentheight=crossobj.offsetHeight;
	document.getElementById("down"+val).style.display="";
	if(parseInt(crossobj.style.top)<0){
		crossobj.style.top=parseInt(crossobj.style.top)+speed+"px";
		moveupvar=setTimeout("moveup("+val+")",20);
	}else {
		document.getElementById("up"+val).style.display="none";
	}
}

function movedown(val,speed){
	crossobj=document.getElementById("conteneur"+val);
	contentheight=crossobj.offsetHeight;
	document.getElementById("up"+val).style.display="";
	if (parseInt(crossobj.style.top)>(-contentheight+document.getElementById("masque"+val).offsetHeight)){
		crossobj.style.top=parseInt(crossobj.style.top)-speed+"px";
		movedownvar=setTimeout("movedown("+val+","+speed+")",20);
	}else{
		document.getElementById("up"+val).style.display="";
		document.getElementById("down"+val).style.display="none";
	}
}


function moveleft(val,speed){
	crossobj=document.getElementById("conteneur"+val);
	contentwidth=crossobj.offsetWidth;
	if (parseInt(crossobj.style.left)>=(-contentwidth+document.getElementById("masque"+val).offsetWidth) ){
		crossobj.style.left=parseInt(crossobj.style.left)-speed+"px";
		moveleftvar=setTimeout("moveleft("+val+","+speed+")",20);
	}
}

function moveright(val,speed){
	crossobj=document.getElementById("conteneur"+val);
	masque=document.getElementById("masque"+val).offsetWidth;
	contentwidth=crossobj.offsetWidth;
	if(parseInt(crossobj.style.left)<0){
		ll=((masque+parseInt(crossobj.style.left))-masque)+parseInt(speed);
		crossobj.style.left=ll+"px";
		moverightvar=setTimeout("moveright("+val+","+speed+")",20);
	}
	
}