var ua;
ua = navigator.userAgent;
if(ua.indexOf("MSIE",0) >= 0 )
{	/* IEの場合 */
	document.write("<link rel='stylesheet' href='./stylesheet-orion1.css' type='text/css'>");
}
else
{	/* それ以外(とりあえずおおざっぱ) */
	document.write("<link rel='stylesheet' href='./stylesheet-orion_ff.css' type='text/css'>");
}