var URL = 'http://www.u-tokyo.ac.jp';
var agent = navigator.userAgent.toLowerCase();
major = parseInt(navigator.appVersion);
minor = parseFloat(navigator.appVersion);

ns = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
nsold = (ns && (major <= 4));
nsnew = (ns && (major > 4));

ie = (agent.indexOf("msie") != -1);
ieold = (ie && (major == 2));
ienew = (ie && (major >= 4));

op = (agent.indexOf("opera") != -1);
 if (op)ie = 0;
saf = (agent.indexOf("safari") != -1);

pc  = (agent.indexOf("win") != -1);
mac = (agent.indexOf("mac")!=-1);
unix = (agent.indexOf("x11") != -1);

os="pc";
browser="ie";

if (pc)
	os="pc";
if (mac)
	os="mac";
if (unix)
	os="unix";
if (ns)
	browser="ns";
if (ie)
	browser="ie";
if (op)
	browser="op";
if (saf)
	browser="saf";

document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="' + URL + '/global/css/'+os+'_'+browser+'.css">')