var navVer = navigator.appVersion;
if(navVer.substr(0,3) >= 4)
if((navigator.appName=='Netscape') && (parseInt(navigator.appVersion)==4))
document.write("<"+"script language='JavaScript' type='text/javascript' src='s_menu_ns.js'><\/script\>");
else
document.write("<"+"script language='JavaScript' type='text/javascript' src='s_menu_ie.js'><\/script\>");