function popupcentree(page,largeur,hauteur,options) {     
	var top=(screen.height-hauteur)/2;     
	var left=(screen.width-largeur)/2;     
	window.open(page,"","menubar=no, status=no, scrollbars=yes, top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options); 
}