function affichernav(){

if (($("barreSortie4").offsetHeight) >$("barreSortie4").parentNode.offsetHeight){
	new Effect.Appear("scrolldiv")};

//alert($("barreSortie4").offsetHeight + "   " +$("barreSortie4").parentNode.offsetHeight+ "   " +$("barreSortie4").parentNode.id);
}


function demarrer_article2(){

//menu

affichernav();



//Event.observe(document, 'mouseover', affichernav);  

}

function slider_scroll(cible,position){
	
	var valeuretape=Math.abs((cible.offsetHeight-350)/20);
	cible.style.top= valeuretape*position*(-1)+"px";
}