JQuery :: Selecting Index Of Currently Clicked Item From Inside Another Element?

I'm trying to find the currently clicked index of .accordion_trigger from within another element.

When inside the .accordion_trigger click event I can simply do the below to get the current clicked index:

Code:
$('.accordion_trigger').click(function(){
var index = $('.accordion_trigger').index(this);
}
return false;
});

Obviously this doesn't work when called from within another element. I understand that 'this' is part of the problem but can't seem to find a way to form the code in such a way for it to produce a valid result. Thus far I only get -1 or 0.

When .accordion_trigger is clicked it has an "$(this).toggleClass('active').next().slideDown();" applied so in theory I shold be able to search for which of the .accordion_trigger's are "active".

I've also tried doing this via the below method but to no avail:

Code:
var current = $('.accordion_trigger');
current.each(function() {
if ($(this).hasClass('active')) {

[Code]....