function getDocumentContent($url, $port=80, $proxy=null, $method='GET', $dataFields=null) {
		$content		= null;
		$data_to_send	= '';
		$host			= Crawler::getDomainFromUrl($url);
		if(empty($proxy)) {
			$proxy = $host;
		}
		$socket = fsockopen($proxy, $port);

		if($socket) {
			socket_set_timeout($socket, 5);
			
			if(is_array($dataFields)) {
				foreach($dataFields as $key => $value) {
					$data_to_send[] = $key.'='.$value;
				}
				$data_to_send = implode('&', $data_to_send);
			}
			
			if($method == 'GET') {
				$getString = 'GET '.$url." HTTP/1.0\r\nHost: ".$host."\r\n\r\n";
				fputs($socket, $getString);
			} else if($method == 'POST') {
				fputs($socket, "POST ".$url." HTTP/1.1\r\n");
				fputs($socket, "Host: ".$host."\r\n");
				fputs($socket, "Referer: www.eine-domain.de".$host."\r\n");
				fputs($socket, "Content-type: application/x-www-form-urlencoded\r\n");
				fputs($socket, "Content-length: ". strlen($data_to_send) ."\r\n");
				fputs($socket, "Connection: close\r\n\r\n");
				fputs($socket, $data_to_send);
			}

			while($line = fgets($socket)) {
				$content .= $line;
			}
			fclose($socket);
		} 
		return $content;
	}