How to use phantomjs? - phantomjs

Question

I would like to learn phantomjs, but i can`t find good tutorial. I have 2 questions:
where is problem in following code (need to capture label of button and write to file):
var page = require('webpage').create();
var fs = require('fs');
page.onConsoleMessage = function(msg) {
phantom.outputEncoding = "utf-8";
console.log(msg);
};
page.open("http://vk.com", function(status) {
if ( status === "success" ) {
page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js", function() {
page.evaluate(function() {
var str = $("#quick_login_button").text();
f = fs.open("ololo.txt", "w");
f.writeLine(str);
f.close();
console.log("done");
});
phantom.exit();
});
}
});
what tutorial in phantomjs you can advice to me? (not from official site)

Answer 1

Because execution is sandboxed, the web page has no access to the phantom objects.
var page = require('webpage').create();
var fs = require('fs');
page.onConsoleMessage = function(msg) {
phantom.outputEncoding = "utf-8";
console.log(msg);
};
page.open("http://vk.com", function(status) {
if ( status === "success" ) {
page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js", function() {
var str = page.evaluate(function() {
return $("#quick_login_button").text();
});
f = fs.open("ololo.txt", "w");
f.writeLine(str);
f.close();
console.log("done");
phantom.exit();
});
}
});
PhantomJS comes with a lot of included examples. Take a look here.