if((navigator.appName=="Netscape") && (parseInt(navigator.appVersion)==4))
document.write('<' + 'script language="JavaScript" type="text/javascript" src="http://web.umtbookstore.com/umtbookstore/js/leftnav_ns.js"><\/script\>');
else
document.write('<' + 'script language="JavaScript" type="text/javascript" src="http://web.umtbookstore.com/umtbookstore/js/leftnav.js"><\/script\>');