function openMentions(){
	var top=(screen.height-425)/2;
	var left=(screen.width-375)/2;
	var win = window.open("mentions.html", "mentions", "width=425, height=375, resizable=yes, scrollbars=yes, top="+top+", left="+left+"");
	if (navigator.appVersion.indexOf("MSIE 4.0") < 0) win.focus();
}