Want help in Google map to ajax code in it

I want help in google map to add ajax code in it. Ajax code is ready. Just have to add the onclick event & <div></div> tag of response into map. I am using Opengts Software & Google Map in it. So in map it is showing the many Pushpin (Ballons) of location of vehicle. So when user click on that pushpin 1 alert box is open in map with all the deatils like longitude, latitude, address, speed etc. So i want to use that Pushpin as Button for Onclick Event. So when user click on Pushpin ajax request is send to backend & Show the result in the alert box. I have attached the 2 images of map. [login to view URL] images is currently working but i want to make it as After_goolemap.jpeg. So the text in front of "Please wait for showing address......" is replaced by address retrieved by ajax code. "[login to view URL]" file show the output as "[login to view URL]" after compiling the java code. So I want to take longitude & latitude from [login to view URL] file of that pushpin & send the request to backend & show the address in alaert box. So any one done such type of job before?? OR some one know the opengts who tried it??? Those who know java , jsp & google map then its easy job for him. Pm me