asp.net with google map api v3 small work

I have a MS SQL database with latitude and longitude and some other column. I can show all the lat long on map at the same time. What i need from you is, update marker position according to my database lat long updation. I want to do it without refreshing the page/map. I know this is a small task for expert. So if you are an expert then only bid here. I need this done asap. Check this page ... this page is refreshing and updating marker location. I want you to stop the refreshing and update marker location thats it