HTML sniffer code

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>PERCo-SEB</TITLE>
<META http-equiv=Content-Type content="text/html; charset=windows-1251">
</HEAD>
<BODY bgColor=gray>
<SCRIPT LANGUAGE=JavaScript>
<!--
var plugin = (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"]) ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
if ( plugin ) {
 plugin = parseInt(plugin.description.substring(plugin.description.indexOf(".")-1)) >= 4;
}
else if (navigator.userAgent && navigator.userAgent.indexOf("MSIE")>=0 && (navigator.userAgent.indexOf("Windows 95")>=0 || navigator.userAgent.indexOf("Windows 98")>=0 || navigator.userAgent.indexOf("Windows NT")>=0)) {
 document.write('<SCRIPT LANGUAGE=VBScript\> \n');
 document.write('on error resume next \n');
 document.write('plugin = ( IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.4")))\n');
 document.write('if ( plugin <= 0 ) then plugin = ( IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.5")))\n');
 document.write('if ( plugin <= 0 ) then plugin = ( IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.6")))\n');
 document.write('<\/SCRIPT\> \n');
}
if ( plugin ) {
 document.write('<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"');
 document.write('  codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=4,0,0,0" ');
 document.write(' ID=FLASH_AD WIDTH=300 HEIGHT=120>');
 document.write(' <PARAM NAME=movie VALUE="file.swf?banner_href=http://domain.com/"> <PARAM NAME=quality VALUE=high> <PARAM NAME=bgcolor VALUE=#FFFFFF> ');
 document.write(' <EMBED src="file.swf?banner_href=http://domain.com/" quality=high ');
 document.write(' swLiveConnect=FALSE WIDTH=300 HEIGHT=120 bgcolor=#FFFFFF');
 document.write(' TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash">');
 document.write(' </EMBED>');
 document.write(' </OBJECT>');
} else if (!(navigator.appName && navigator.appName.indexOf("Netscape")>=0 && navigator.appVersion.indexOf("2.")>=0)){
 document.write('<A TARGET="_blank" HREF="http://domain.com"><IMG SRC="/zaglushka.gif" WIDTH=300 HEIGHT=120 BORDER=0></A>');
}
//-->
</SCRIPT>
<NOEMBED><A TARGET="_blank" HREF="http://domain.com"><IMG SRC="/zaglushka.gif" WIDTH=300 HEIGHT=120 BORDER=0></A></NOEMBED><NOSCRIPT><A TARGET="_blank" HREF="http://domain.com"><IMG SRC="/zaglushka.gif" WIDTH=300 HEIGHT=120 BORDER=0></A></NOSCRIPT>
</BODY></HTML>