mass:werk termlib.js

  var term = new Terminal( {handler: termHandler} );
  term.open();

  function termHandler() {
     this.newLine();
     var line = this.lineBuffer;
     if (line != "") {
        this.write("You typed: "+line);
     }
     this.prompt();
  }

• Object oriented: Handle multiple instances independently at the same time!
• Type styles: Ready-to-use type styles and support for custom styles and mark up.
Colors: Extended support for colors.
• ANSI codes: Limited ANSI-support for SGR codes.
• Text wrapping: Automatic text wrapping (v 1.3 and higher, see faq for details)
• Remote communications: The socket extension for client-server remote communication (commonly known as AJAX) provides a tightly integrated API for a simple and object oriented approach to XMLHttpRequests.
  (Starting with version 1.5 the socket extension is included in the main library.)
• Import methods: "termlib.js" provides methods for text import via dialogs or copy'n'paste.
• Parser: Set up your own shell-like application using the included parser.
• Documentation: Extensive documentation and loads of usage examples.
• Free: Best of all: "termlib.js" is free, see the licence below.