Bootstrap well equal height

var
  elements = document.querySelectorAll(".well"),
  heights = [];

/* Getting an array with the heights */
[].forEach.call(elements, function(each) {
  heights[heights.length] = getComputedStyle(each, null).getPropertyValue("height");
});

/* Sorting the array to get the greatest value first */
heights.sort(function(a, b) {
  return parseFloat(b) - parseFloat(a);
});

/* Applying the greatest height to each element */
[].forEach.call(elements, function(each) {
  each.style.height = heights[0];
});