var gototop = null;
addEvent(window,"load",init);
function init(){
	registerControls();
}
function registerControls(){
	gototop = document.getElementById("allerenhaut");
	
	if( gototop )
	{
	    gototop.img = document.getElementById("allerenhaut_img");
	    gototop.onmouseover = function(){
		    this.img.src="images/bouton-haut-sur.gif";
	    }
	    gototop.onmouseout = function(){
		    this.img.src="images/bouton-haut-off.gif";
	    }
	}
}