I don't know why they do it that way. Acer, Compaq/HP has the function keys hardwired.
Here is the specs for the one on BB.com, the product code is off by one (listed below is Toshiba A135-S7404). Most likely it is the same one being offered on BF, BB has a habit of changing product codes by a couple numbers to stop price matching. Not sure if that is the case here.
Intel® Celeron® M processor 530 with 533MHz frontside bus, 1MB L2 cache and 1.73GHz processor speed
512MB DDR2 SDRAM for multitasking power, expandable to 2GB
Multiformat DVD±RW/CD-RW drive with double-layer support records up to 8.5GB of data or 4 hours of video using compatible DVD+R DL and DVD-R DL media; also supports DVD-RAM
15.4" TFT-LCD widescreen display with TruBrite technology and 1280 x 800 native resolution; support for 720p
80GB Serial ATA hard drive (5400 rpm)
Intel® Graphics Media Accelerator 950 with 8MB-64MB dynamically allocated shared graphics memory; S-video output
CD/DVD media controls for easy one-touch access to movies and music; Internet button conveniently launches default Web browser
5-in-1 bridge media adapter supports Memory Stick, Memory Stick PRO, MultiMediaCard, Secure Digital and xD-Picture Card
4 high-speed USB 2.0 ports for fast digital video, audio and data transfer
Built-in Atheros high-speed wireless LAN (802.11b/g); 10/100Base-TX Ethernet LAN with RJ-45 connector; 56 Kbps modem
Weighs only 6 lbs. and measures just 1.5" thin for lightweight portability; lithium-ion battery
Microsoft Windows Vista Home Basic Edition operating system preinstalled; software package included with Microsoft Works 8.5, Ulead DVD MovieFactory 5, Adobe Acrobat Reader and more