Is there any script about "switch tab in chrome" without using chrome plugin

[av930]

Is there any script about "switch tab in chrome" without using chrome plugin ?
I know there are lot of scripts to switch back and forward simply using ctrl+ pgup, ctrl+pgdn.
Not this one, I need to switch previous tab (recently used tab) and current tab.

I found some code snippet, but I don't have skill to modify it. frustrated..
This is old subject related Chrome, anybody who think over this and find solution?

Please give me tips..