function openPopup(page,larg,haut,scraul){
	var posXpop = (screen.width-larg)/2;
	var posYpop = 0;
	param = "width="+larg+",height="+haut+",left="+posXpop+",top="+posYpop+",scrollbars="+scraul+",resizable=yes";
	popup = window.open(page,"pop",param);
}