example1.js

var system = require('system');

// Check argument count
if (system.args.length === 2) {
    var url = system.args[1];
}
else {
    // Quit without correct arguments
    console.log("URL Parameter Required.");
    phantom.exit();
}

// Create new WebPage object for browsing
var page = new WebPage();

// Callback for page onload
page.onLoadFinished = function (msg) {
    // Take a screenshot and exit
    page.render("page.png");
    phantom.exit();
}

// Browse to url
page.open(url);