filterSelection("all")
function filterSelection(c) {
  var x, i;
  x = document.getElementsByClassName("filterItem");
  if (c == "all") c = "";
  // Add the "show" class (display:block) to the filtered elements, and remove the "show" class from the elements that are not selected
  for (i = 0; i < x.length; i++) {
    w3RemoveClass(x[i], "show");
    if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
  }
}

// Show filtered elements
function w3AddClass(element, name) {
  var i, arr1, arr2;
  arr1 = element.className.split(" ");
  arr2 = name.split(" ");
  for (i = 0; i < arr2.length; i++) {
    if (arr1.indexOf(arr2[i]) == -1) {
      element.className += " " + arr2[i];
    }
  }
}

// Hide elements that are not selected
function w3RemoveClass(element, name) {
  var i, arr1, arr2;
  arr1 = element.className.split(" ");
  arr2 = name.split(" ");
  for (i = 0; i < arr2.length; i++) {
    while (arr1.indexOf(arr2[i]) > -1) {
      arr1.splice(arr1.indexOf(arr2[i]), 1);
    }
  }
  element.className = arr1.join(" ");
}

// JQuery to copy hide/show behavior over to parent table rows of table cells that contain <span filterItem></span>

jQuery(document).ready(function ($) {

    $('.filterButtons label input').on('click', function (){
        var tableSpan = document.querySelectorAll('table tbody tr td span.filterItem');
        $(tableSpan).each(function () {
            if (!$(this).hasClass('show')) {
                $(this).parents('tr').hide()
            } else {
                $(this).parents('tr').show() 
            };
        });
    });

});