find the value of psudo class variable in javascript

hey every one I want to alert value of n from this string

$('.or开发者_高级运维bit-bullets:has( > li.active:nth-child)');

If you want the index of a li with the class active inside an element with the class orbit-bullits you could do something like this:

$('.orbit-bullets>li.active').index()

this will return a 0-based index