I'm new to CasperJS. How come `this.echo(this.getTitle());` works but `console.log("Page Title ", document.title);` doesn't? Also why isn't my document.querySelector working? Does anyone have a good explanation? Where in the CasperJS documentation can I find the answer?

Here's my code:

```
var casper = require('casper').create();
var url = 'http://www.example.com/';

 casper.start(url, function() {
     this.echo(this.getTitle()); // works
     this.echo(this.getCurrentUrl()); // works
});

casper.then(function(){
    this.echo(this.getCurrentUrl()); // works
    console.log("this is URL: ", document.URL); // doesn't work
    console.log("Page Title ", document.title); // doesn't work
    var paragraph = document.querySelectorAll('p')[0].innerHTML;
    console.log(paragraph); // doesn't work
});

casper.run();

```

**EDIT:**
I'm using casper.thenEvaluate and casper.evaluate now and it's still not working. Any ideas?

```
var casper = require('casper').create();
var url = 'http://www.example.com/';

casper.start(url, function() {
    this.echo(this.getTitle()); // works
    this.echo(this.getCurrentUrl()); // works
    console.log('page loaded: '); // works
});

casper.thenEvaluate(function(){
    var paragraph = document.querySelectorAll('p')[0].innerHTML; // doesn't work
    console.log(paragraph); // doesn't work
    console.log("Page Title ", document.title); // doesn't work
});

casper.run();

```