Hide scrollbar, but still scrollable (using CSS)

I made post about this topic by using javascript onmousewheel event, then by calculating delta status we can trigger function that perform scroll up/down via window.scrollTo object.

Actually it’s good technique, I use it since 2007, but the challenges are:
– different delta calculation for different browser
– need decent function to performs good/realistic mouse scroll up/down response.

I found somewhere in internet the other technique, using CSS. Less codes, cross browser, and use native mouse scrolling feature, here’s the codes