jsdataview.example.js

var file = jDataView.createBuffer(
    0x10, 0x01, 0x00, 0x00, // Int32 - 272
    0x90, 0xcf, 0x1b, 0x47, // Float32 - 39887.5625
    0, 0, 0, 0, 0, 0, 0, 0, // 8 blank bytes
    0x4d, 0x44, 0x32, 0x30, // String - MD20
    0x61                    // Char - a
);

// Now we use the DataView as defined in the specification, the only thing that changes is the j before jDataView.

var view = new jDataView(file);
var version = view.getInt32(0); // 272
var float = view.getFloat32(4); // 39887.5625
The wrapper extends the specification to make the DataView easier to use.

var view = new jDataView(file);

// A position counter is managed. Remove the argument to read right after the last read.
version = view.getInt32(); // 272
float = view.getFloat32(); // 39887.5625

// You can move around with tell() and seek()
view.seek(view.tell() + 8);

// Two helpers: getChar and getString will make your life easier
var tag = view.getString(4); // MD20
var char = view.getChar(); // a

// You can use a patched version of jQuery that supports ArrayBuffer for AJAX.

$.get(
  'data.bin',
  function (data) {
    var view = new jDataView(data);
    var tag = view.getString(4); // 'MD20'
    var version = view.getUint32(); // 732
  },
  'binary'
);