current ARRAY_BUFFER
  // and copy in the texcoord values
  var texcoordBuffer = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, texcoordBuffer);
  setTexcoords(gl);

  // Turn on the attribute
  gl.enableVertexAttribArray(texcoordAttributeLocation);

  // Tell the attribute how to get data out of texcoordBuffer (ARRAY_BUFFER)
  var size = 2;          // 2 components per iteration
  var type = gl.FLOAT;   // the data is 32bit floating point values
  var normalize = true;  // convert from 0-255 to 0.0-1.