curl problem, can't download full web page

With this code I'm trying to download this web page: http://www.kayak.com/s/...

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,'http://www.kayak.com/s/search/air?ai=kayaksample&do=y&ft=ow&ns=n&cb=e&pa=1&l1=ZAG&t1=a&df=dmy&d1=4/10/2010&depart_flex=exact&r1=y&l2=LON&t2=a&d2=11/10/2010&return_flex&r2=y');

 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
 cur开发者_运维百科l_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_FAILONERROR, true);
 curl_setopt($ch, CURLOPT_REFERER,"http://wwww.google.com"); 

 $content = curl_exec ($ch);
 echo $content;

You can see the demo at: http://www.pointout.org/test.php

As you can see the part with prices is missing.

What could be wrong?

This is not going to work the way you think it will. The reason is the prices are not in the initial HTML response that you get. Rather, there is some Javascript magic occurring which is using AJAX to load the prices when the page is loaded.