Doing a partial postback.

Doing a partial postback.

Hi,
 
I am using a componentone carousel control to view thumbnail photos. On the client click I want to do a partial postback so I can load the photo in a larger image but at the same time lay on top some blob divs. I can do this
 
$(".imgSave").click();
 
Which does a full postback and the whole page is loaded and it looks clunky.
 
Is it possbile to have it simply partial postback which simple loads the new image and moves the blobs on the photo with out a full page load?
 
Many Thanks,
 
Jiggy
 
PS. Very new to this development