function popup(page) {	
	var largeur = 650;
	var hauteur = 460;	
	var top = (window.screen.height-largeur)/2;	
  	var left = (window.screen.width-largeur)/2;	
  	w=window.open(page,"popup","top="+top+",left="+left+",width="+largeur+",height="+hauteur+",resizable=yes, location=no, menubar=no, status=no, scrollbars=yes");  
	w.focus();
}