I happen to know the reason: the shortest way to make a link without an href clickable is to set it's href to "#". The onclick event should prevent the browser from going there, but if the site is slow or the AJAX hasn't loaded yet, or the scripting has errors, the browser will instead go to http://current_page#, which makes the page jump to the top.

Bad scripting.

Check these program.

http://thisisudax.org/?p=1

When I try to click submit the page often jumps and weeks ago I asked about it and other have seen the same symptom.

Since then, I have switched from a Dell with Win XP to an ASUS with Win8.1 and it's still doing it.

Does anyone have any idea what would make a webpage do that? I've never seen it happening on any other website?