I try with this script:
$url = "http://www.easyjet.com/it/Prenota/step1.asp/";
$user_agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";
$post = "__step=1&__action=goto__goto=step2.asp&txtorigID=&txtdestID=&txtdorig=&txtddest=&numOfPax=1&__STATEDATA=".urlencode ("MIIBpAYJKwYBBAGCN1gDoIIBlTCCAZEGCisGAQQBgjdYAwGgggGBMIIBfQIDAgAA|AgJmAwICAMAECP3CkQb2IXGHBBBKfDW+eavLpBAz99Jt4S23BIIBUAX79dX48dsC|zWQMlEQqSfo28S3Jopi16S+oTP+l+7CD6BsPW8aUchjnfVhDOeRK2W32l8NLAPU+|oePxEqvLnxG/0a1wB4coUFqCjlV3hwDSxx2ptQm2M5MFD2Bwt/F+XqeqD5TKjWfN|hqWMO5HiwQ4SGaeJ2DzIjVYaJpzqx7QgJtQMiXfnSk0Wvjj7G8M0e3CkphRcG+eA|32uKn1INQDoIHJRrBAfZQ1F9tHJYJyV/rGUyVvmzI/VspMIjsrSdX7uSKFG0x9q/|kOYFIrQc2+Jh6Umt/Rh8dKVEk2ONkgtkWvcdzCSFyS5VjrR/FUv+nOevfF5PcuVV|K4PkKZW8QcD/zNc7OjnUMEivpLQ2zBWiOBVbX1jlCEADmSrmHRQPO+OVE3Ttk86o|fIvaITuDnbEyRYoEHUD7NSuhmn1Lh9u2U3l2/fn/B/e5ZJTWeTPl3g==|")."&orig=ATH&dest=LTN&oDay=12&oMonYear=022005&rDay=00&rMonYear=00&numOfAdults=1&numOfKids=0&numOfInfants=0&strEmail=&strPassword=&strBookingRef=";
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
curl_setopt($ch, CURLOPT_URL, $url );
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POST, 1 );
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
curl_setopt($ch, CURLOPT_COOKIE, "c:\cookie.txt");
curl_setopt($ch, CURLOPT_COOKIEJAR, "c:\cookie.txt");
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
$response = curl_exec( $ch );
curl_close ($ch);
but the result is the same....
Anyone can try to write some code?