selenium ide custom export

export-testingfw.js

function parse(testCase, source) {
}

function format(testCase, name) {
  var result = 'ctx.local.c\n';

  var commands = testCase.commands;
  for (var i = 0; i < commands.length; i++) {
    var command = commands[i];
    if (command.type == 'command') {
        result += '     .' + command.command + '("' + command.target + '"'
        if (command.value) { result += ',"' + command.value + '")\n'; } 
        else { result +=  ')\n'; }
    }
  }
  return result;
}

function formatCommands(commands) {
}

how to use this script?