sending information without reloading

Hi everybody
i have a page that has 4 images.
and each image has a check box that
if user check it the image add to his
private gallery.
now, i want when he check the check box, the name of
image add to his account without reloading page
or any change else.
thank you in advance

 

i guess this is made by AJAX ..

 

thanks body
does it decrease speed of the site ?
would you please introduce a good resources for learning ajax.(just one resource)

 

ajaaaaaaaaaaaaaaaaaaaaaaaaaaaax

 

If you are a PHP developer and don't know much about Javascript for Ajax, check out Xajaxproject.org. It's amazingly easy to learn and actually does most things well.