function popup_epr() {
		page = 'http://www.edf.fr/html/epr/index.html';		
		var top = (screen.height / 2) - (580 / 2) - 20;
		var left = ((screen.width - 700) / 2);
		options = "width=700,height=480,resizable=0,menubar=0,scrollbars=0,statusbar=0"+",top="+top+",left="+left;
		win_image = window.open(page,"epr",options);
}