my browser scrolls slowly in any page of

i am using IE7.
anytime i browse a page in this site, including forum, IE7 scrolls like slideshow.
that doesn’t happen at other sites.
why is this?
typing speed is normal, only problem is scrolling.

No idea about the actual problem, but may I ask why you’re using such an ancient, slow and vulnerable browser?

because browsing internet is not really my thing, as long as a software still works, I don’t want to install another software.
now I don’t have that problem anymore, I use android, the preinstalled browser is opera, it’s good enough for me.