No wireless on my Dell Inspiron 1545 Ubuntu

No wireless on my Dell Inspiron 1545 Ubuntu

I had installed Ubuntu 12.10 a few months back but never really used wireless device. I did use wireless before that when I had windows installed on my Dell, but then I switched to Ubuntu and the option for Wireless never worked. I used to work with LAN network till now and that worked just fine, but now since I have relocated, I have dongle for my internet but now I want to share this over a wireless network which I am unable to figure out.
Here's a couple of things that may help regarding this :
The snapshot  shows no wireless option here.
Also the result of lshw -class network
is
 *-network              
   description: Ethernet interface
   product: 88E8040 PCI-E Fast Ethernet Controller
   vendor: Marvell Technology Group Ltd.
   physical id: 0
   bus info: pci@0000:09:00.0
   logical name: eth0
   version: 13
   serial: 00:23:ae:34:46:d2
   capacity: 100Mbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp     10bt 10bt-fd 100bt 100bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=sky2     driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
   resources: irq:45 memory:f69fc000-f69fffff ioport:de00(size=256)
*EDIT 1 *
lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory     Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset     Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset     Integrated Graphics Controller (rev 07)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI     Controller #4 (rev 03)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI     Controller #5 (rev 03)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI     Controller #6 (rev 03)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI     Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio     Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port     1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port     2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port     3 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port     5 (rev 03)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI     Controller #1 (rev 03)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI     Controller #2 (rev 03)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI     Controller #3 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI     Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev     03)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4     port SATA Controller [AHCI mode] (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev     03)
09:00.0 Ethernet controller: Marvell Technol