backported dynamic.js sample example to require branch

+if (phantom.casperArgs.args.length !== 1) {
+    console.log('You must provide the maximum number of pages to visit');
+    phantom.exit(1);
+}
+
+var casper = require('casper').create({
+    verbose: true
+});
+
+// If we don't set a limit, it could go on forever
+var upTo = ~~casper.cli.get(0) || 10; // max 10 links
+
+// Fetch all <a> elements from the page and return
+// the ones which contains a href starting with 'http://'
+function searchLinks() {
+    var filter = Array.prototype.filter,
+        map = Array.prototype.map;
+    return map.call(filter.call(document.querySelectorAll('a'), function(a) {
+        return (/^http:\/\/.*/i).test(a.getAttribute('href'));
+    }), function(a) {
+        return a.getAttribute('href');
+    });
+}
+
+// The base links array
+var links = [
+    'http://google.com/',
+    'http://yahoo.com/',
+    'http://bing.com/'
+];
+
+// Just opens the page and prints the title
+var start = function(self, link) {
+    self.start(link, function(self) {
+        self.echo('Page title: ' + self.getTitle());
+    });
+};
+
+// Get the links, and add them to the links array
+// (It could be done all in one step, but it is intentionally splitted)
+var addLinks = function(link) {
+    this.then(function(self) {
+        var found = self.evaluate(searchLinks);
+        self.echo(found.length + " links found on " + link);
+        links = links.concat(found);
+    });
+};
+
+casper.start().then(function(self) {
+    self.echo('Starting');
+});
+
+var currentLink = 0;
+
+// As long as it has a next link, and is under the maximum limit, will keep running
+function check(self) {
+    if (links[currentLink] && currentLink < upTo) {
+        self.echo('--- Link ' + currentLink + ' ---');
+        start(self, links[currentLink]);
+        addLinks.call(self, links[currentLink]);
+        currentLink++;
+        self.run(check);
+    } else {
+        self.echo('All done.').exit();
+    }
+}
+
+casper.run(check);