Joomla and jquery simple question

Hello

Here s a simple question, could someone tell me what is the use of the last part of this line of code ?

jQuery("#city").val(panels[<?php echo $this->work->fk_panel_id;?>].city_id);

Code (markup):

I know it sets the value of the city dropdown box. My question is to roughly know what it is doing exactly ?

It assigns a value to city but what is panels supposed to be ? an array ? what is .city_id used for at the end.

You ll understand i have no jquery background , tks for your answer

 

Its setting the input#city with the value of the city_id from the panels object which matches the fk_panel_id. You have pretty much answered this yourself.

 

thanks, i was not too sure about this !