Tax calculation based on zip code using jquery

Tax calculation based on zip code using jquery

jQuery(document).ready(function($){
  $(".firstdiv input").keyup(function(){
    if (this.value == "48108"){
     $(".seconddiv input").val("6").trigger("change")
    }
    else if (this.value == "33319"){
     $(".seconddiv input").val("7").trigger("change")
    }
    else{
     $(".seconddiv input").val(" ").trigger("change")
    }
  });
});