Unable to show axact location on google map in ASP.Net

Question

Hi all, I am having problem in using Google API in asp.net. I have got a page in which i have the lists of pharmacies. What I want is when uset click on the pharmacy name Google map open pointing the location of the pharmacy.
But the problem is that when Google map open by clicking pharmacy name it shows world map, and zipcode of the pharmacy in the search bar.
No When i click the search button on it starts pin pointing the exact location of pharmacy; however, the URL I passed to browser still remains same after clicking search button.
http://maps.google.co.uk/maps?f=q&source=embed&hl=en&geocode=&q=M11AA&ie=UTF8&hq=&hnear=M11AA,&z=14&ll=51.732663,-0.295773
I want to pin point the Pharmacy just by clicking pharmacy name, dont want to hit search button.
Does any body know how to get this thing done.
Thanks,
Ali Raza