hi
I am new with ajax and i want to multiple image upload in a ads post site.
please help me

If you are new to Ajax, you shouldn't try to jump start from the top of the hill! You need to learn how Ajax works and such. If you try to start from the middle of knowledge, you will leave with half baked knowledge which leads to bad scripting... At least show us how much you know because your current post is similar to asking people here to give you the script.