function popup(dirname){
	window.open('detail.php?s='+dirname+'&n=0', 'detail', 'width=880,height=690,resizable=yes');
}
function popupinfo(url){
	window.open(url, "detail", "width=500,height=500,scrollbars=yes,resizable=yes");
}
function rollover(id){
	document.getElementById(id).style.visibility="visible";
}
function rollout(id){
	document.getElementById(id).style.visibility="hidden";
}