function popupcentree(page,nom,largeur,hauteur,options)
{
	//var top= 40 ///(screen.height-hauteur)/2;
	var top=(screen.height-hauteur)/2;
	var left=(screen.width-largeur)/2; 	
	window.open(page,nom,"top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options).focus();

}