Loading images into array + showing based on selection in VWO

imageselect-vwo.js

   vwo_$('a#severModalBTN, a#selectModalBTN').on('click', function(element) {
    step2(vwo_$('#select-server input[type*="radio"]').filter(':checked').attr('value'));
   });
      
    function step2(input) {
      switch (input) {
        case '27':
            isSlimOrNot = true;
            step3(vwo_$('div.normal').find(':checked').attr('value'));
            break;
        case '18':
            isSlimOrNot = false;
            step3(vwo_$('div.amadana2-color.select-form').find(':checked').attr('value'));
            break;
        case '14':
            isSlimOrNot = false;
            step3(vwo_$('div.amadana-color.select-form').find(':checked').attr('value'));
            break;
        case '29':
            isSlimOrNot = false;
            step3(vwo_$('div.cado-2017-color.select-form').find(':checked').attr('value'));
            break;
		}
    }
  
    function step3(value) {
      if(isSlimOrNot) {
        if(vwo_$('#longSize1').is(':checked')) {
          vwo_$('div.modalContent img:nth-child(1)').attr('src', arrSlimLong[vwo_$('.width.server_color_slim3').find(':checked').attr('value')]["front"]);
          vwo_$('div.modalContent img:nth-child(2)').attr('src', arrSlimLong[vwo_$('.width.server_color_slim3').find(':checked').attr('value')]["side"]);
        } else if(vwo_$('#shortSize1').is(':checked')) {
          console.log(vwo_$('width.server_color_slim3').find(':checked').attr('value'));
          vwo_$('div.modalContent img:nth-child(1)').attr('src', arrSlimShort[vwo_$('.width.server_color_slim3').find(':checked').attr('value')]["front"]);
          vwo_$('div.modalContent img:nth-child(2)').attr('src', arrSlimShort[vwo_$('.width.server_color_slim3').find(':checked').attr('value')]["side"]);
        }
      } else {
        vwo_$('div.modalContent img:nth-child(1)').attr('src', arr[value]["front"]);
        vwo_$('div.modalContent img:nth-child(2)').attr('src', arr[value]["side"]);                                 
      }
      vwo_$('body, html').addClass('no-scroll');
      vwo_$('div#vwoModal').addClass('visible');
   }
})(jQuery);
var isSlimOrNot = false;
//put img src between quotes. The input values are on the left
var arr = {
  "43": {"front": "", "side": ""}
};
var arrSlimShort = {
  "44": {"front": "", "side": ""}
};
var arrSlimLong = {
  "45": {"front": "", "side": ""}
};