Which silverOrchid theme – there are several by that name – are you using? Where did you get it?
Silverorchid magazine theme by gazpo.com
There are a rotate slider at the top with one featured picture big and four smaller at the right.
I am trying to figure out the jquery of the slider but I can’t.
These forums are for support for themes available in the WordPress theme directory at ww.wp.xz.cn/extend/themes/. Try the support comments at the bottom of that page. You need to look in the JS files for the slider; should be a variable for autoplay.
