如何在setInterval函数中动态地将变量传递给PHP脚本调用？

I have a script here that is supposed to load a php script output into a specified 'div' within set intervals, and be able to apply filters by means of sending values from two 'select' lists to that script. I have realized the first thing with some help from another topic here on Stack, it's listed in $(document).ready() event. But then i have $("#status_filter").change() and $("#car_filter").change() events. They are supposed to first stop refreshId interval function, then change variables that i am supposed to send to PHP script, reload content with changed variables and start refreshId loop again. As a result, i have the loop working with zero values, but browser doesn't react to selecting options from the list. I've been playing with the code parts for a while now, but to no avail. Please, help me if you can.I have a script here that is supposed to load a