Simple PhantomJS screenshot script

screenshot.js

#!/usr/local/bin/phantomjs

var page = require('webpage').create();
var system = require('system');
var t, address;

if (system.args.length === 1) {
    console.log('Usage: screenshot.js <some URL>');
    phantom.exit();
}

address = system.args[1];
console.log(address);
page.open(address, function () {
    t = Date.now();
    page.render('screenshot_' + t + '.png');
    phantom.exit();
});