ReferenceError: required is not defined

var dt = required('./DateFunction.js')

         ^

ReferenceError: required is not defined

    at Object.<anonymous> (c:\finder.js:2:10)

    at Module._compile (module.js:643:30)

    at Object.Module._extensions..js (module.js:654:10)

    at Module.load (module.js:556:32)

    at tryModuleLoad (module.js:499:12)

    at Function.Module._load (module.js:491:3)

    at Function.Module.runMain (module.js:684:10)

    at startup (bootstrap_node.js:187:16)

    at bootstrap_node.js:608:3

Node js error. There is no module called "required".  Change to require.

var dt = require('filename')