i have code js in theme:

$(document).keydown(function(a) {
        37 == a.which || 65 == a.which ? $("#prev_chap")[0].click() : 39 == a.which || 68 == a.which ? $("#next_chap")[0].click() : 83 == a.which ? (a = $(window).scrollTop(), $(window).scrollTop(a + 37)) : 87 == a.which && (a = $(window).scrollTop(), $(window).scrollTop(a - 37))
    });

i want disable this js for 87 & 83 in my child theme single.php.

please help me, thanks a lot <3