Call jsx from the same folder in script without extended path

Hi, i actually got this code:

var tabPlecaName = "PlecaTest.jsx";

var tabPlecaPath = $.evalFile + File($.fileName).path + "/" + escape(tabPlecaName);

But the thing is that i cant call my File from the Script UI folder without the extended path like ~/Desktop/Applications/After Effects xxx/blablablabla

I want to call that file from the same folder of my installed Script UI.