docs: function createProgramFromScripts(
        gl, shaderScriptIds, opt_attribs, opt_locations, opt_errorCallback) {
      var shaders = [];
      for (var ii = 0; ii < shaderScriptIds.length; ++ii) {
        shaders.push(createShaderFromScript(
            gl, shaderScriptIds[ii], gl[defaultShaderType[ii]], opt_errorCallback));
      }
      return createProgram(gl, shaders, opt_attribs, opt_locations, opt_errorCallback);
    }