appCodeName

This property is a string that contains the code name of the browser, Netscape for Netscape and Microsoft Internet Explorer for Internet Explorer.

appVersion

This property is a string that contains the version of the browser as well as other useful information such as its language and compatibility.

language

This property contains the two-letter abbreviation for the language that is used by the browser. Netscape only.

mimTypes[]

This property is an array that contains all MIME types supported by the client. Netscape only.

platform[]

This property is a string that contains the platform for which the browser was compiled. “Win32” for 32-bit Windows operating systems.

plugins[]

This property is an array containing all the plug-ins that have been installed on the client. Netscape only.

userAgent[]

This property is a string that contains the code name and version of the browser. This value is sent to the originating server to identify the client.

javaEnabled()

This method determines if JavaScript is enabled in the client. If JavaScript is enabled, this method returns true; otherwise, it returns false.

plugings.refresh

This method makes newly installed plug-ins available and populates the plugins array with all new plug-in names. Netscape only

preference(name,value)

This method allows a signed script to get and set some Netscape preferences. If the second parameter is omitted, this method will return the value of the specified preference; otherwise, it sets the value. Netscape only

taintEnabled()

This method returns true if data tainting is enabled; false otherwise