Plugin to browser methods

The plugin can call these methods in the browser:

• NPN_GetURL() - load a URL into Netscape
• NPN_PostURL() - post to a URL (CGI script)
• NPN_MemAlloc() - ask for memory
• NPN_MemFree()
• NPN_Write() - write to a Netscape stream
• NPN_RequestRead() - read from a Netscape stream
• NPN_GetJavaEnv() - Java env to make calls to Java using native interface
• NPN_GetJavaPeer() - the peer object for this Java instance