Datalist Paging

Hi,
I am implementing Datalist paging in my project. On click of a button in datalist I am opening a pop-up window and updating the details. After updating these details I am closing this child page and refreshing the parent page through child page. But it goes to first page of the parent form irrespective of the page where I was. I want to remain on the same page as I am implementing paging on parent form. Please help!!!

Thanks,
Sheetal