var ua = navigator.userAgent.toLowerCase();
isIE = (ua.indexOf('msie') != -1);
isOpera = (ua.indexOf('opera') != -1);
isNN = (ua.indexOf('navigator') != -1);
if (isNN != false)
	document.writeln('<link rel="stylesheet" type="text/css" href="comments/style/corner_nn.css">');
else if (isIE == false && isOpera == false)
	document.writeln('<link rel="stylesheet" type="text/css" href="comments/style/corner_all.css">');