how the load more button when clicked, show to the top section?

i have set the load more button below the repeater box, and i limited the repeater data to 15 a page, when load more is clicked, it will directed to a new page continue to show rather than just continuing below, but after clicking the button, the data will refresh while it keeps on the current position rather than back to the top of the repeater. How to set it can back to the top and also with load more function? Thanks.