var http = require('http');

var blah = {
  meh2: 'hi... o.O',
  meh: function (req, res) {
  }
}

var ports = [1333,1334,1335,1333];
for (var i=0; i < ports.length; i++) {
  try {
    var server = http.createServer(blah.meh);
    server.listen(ports[i], '');
  }
  catch (err) {
    console.log('createServer throwed: '+err.message);
  }
};


--- Output
node server_test.js

node.js:181
        throw e; // process.nextTick error, or 'error' event on first tick
        ^
Error: EADDRINUSE, Address already in use
    at Array.<anonymous> (net.js:1117:7)
    at EventEmitter._tickCallback (node.js:173:26)