var scrolling = {
	update:function(){
		scrollDiv = document.getElementById("monContenu");
  		scrollDiv.scrollTop = 0;
	},
	scrollingUp:function(){
		var element = document.getElementById("monContenu");
    	var anim = new YAHOO.util.Scroll(element, {scroll: { to: [element.scrollTop, element.scrollTop+285] }}, 0.8, YAHOO.util.Easing.easeIn);
    	anim.animate();
	},
	scrollingDown:function(){
		var element = document.getElementById("monContenu");
	    var anim = new YAHOO.util.Scroll('monContenu', {
	        scroll: { to: [element.scrollTop, element.scrollTop-285] }
	    }, 0.8, YAHOO.util.Easing.easeIn);
	    anim.animate();
	},
	showScroll:function(){
		document.getElementById("btn_haut").style.display = "inline";
		document.getElementById("btn_bas").style.display = "inline";
	}
};