Preview automatically go to Top of the page

Hello guys, I don’t know why my page is going up while scrolling down. It automatically go to the top of the page. then again i have to scroll it down."
please help me !!
thanks in advance.

https://bg4343.axshare.com/#id=vedk7c

It looks like you’ve set a password for that prototype, so I can’t see it.
Could you also upload your .rp file here?