APEX: How to create a filter for a shuttle

Problem

Shuttles are nice, but when you have a lot of values, a filter really helps.

Solution
I came across the code from Jari Laine, which worked perfectly, although I needed to get some help in understanding where to put the code.

Create your shuttle item. Mine was called P55_CURRENT_WORK_S

Now on the same page, go to the page properties and enter the function declaration, and then execute the code to add the filter.

To add the function, copy/paste this into "Function and Global Declaration"
(function($){
$.fn.htmldbShuttlefilter=function(options){
  options=$.extend({},{"label":"Filter"},options);
  return this.each(function(i){
   var $self      = $(this)
   ,filterId      = $self.attr("id") + "_FILTER"
   ,$select       = $self.find("select")
   ,shuttleValues = $select.children("option").map(function(){
    return {text:$(this).text(),value:$(this).val(),option:this}
   })
   ,$filter = $("<input/>",{"type":"text","value":"","size":"255","autocomplete":"off","id":filterId})
   .keyup(function(){
    var filterval   = new RegExp("^"+$(this).val()+".*","i")
,selectedValues = $select.eq(1).children("option").map(function(){
     return $(this).val();
    });
    $select.eq(0).empty();
    $.each(shuttleValues,function(idx,obj){
     if(obj["text"].match(filterval) && $.inArray(obj["value"],selectedValues)<0){
      $select.eq(0).append(obj["option"]);
     }
    });
   })
   .width($self.width());
   $("<div/>",{"css":{"padding-bottom":"5px"}})
   .insertBefore($self)
   .append(
    $("<label/>",{"for":filterId})
    .append($("<span/>",{"css":{"font-weight":"bold"}}).text(options.label))
   )
   .append("<br/>").append($filter);
   $self.find("img[alt='Reset']").click(function(){$filter.val("")});
  });
}
})(jQuery);

Add to execute the code to make the filter, copy/paste this code (replacing with your shuttle name), in the "execute when page loads" section.
$("#P55_CURRENT_WORK_S").htmldbShuttlefilter({});

Result

Acknowledgement

https://jaris.tilaa.cloud/apex/f?p=BLOG:READ:0::::ARTICLE:201410131041380630
https://docs.oracle.com/cd/E14373_01/appdev.32/e13363/javascript.htm#BCEHBIGD