phonegap and cordova.plugins.disusered.open

function view_pdf()
{
    console.log("pdfbutton button clicked");

    cordova.plugins.disusered.open(
        'file:/sdcard/Download/test.pdf', view_success, view_error);

    console.log("after open");
}

function view_success() {
  console.log('Success');
}

function view_error(code) {
  if (code === 1) {
    console.log('No file handler found');
  } else {
    console.log('Undefined error ' + code);
  }
}