function carte(url) {
	mywidth = 640;
	myheigth = 480;
	myleft = (screen.width - mywidth)/2;
	mytop = 80;
	plan = open(url, "popupplan", "scrollbars=no,toolbar=no,width="+mywidth+",height="+myheigth+",top="+mytop+",left="+myleft);
	if (navigator.appVersion.substring(1,0)>="3")
	{
	plan.focus (); 
	}
}