blaine

var setTextMeasure = function (contentElement, targetMeasure, maxSize, minSize) {

  if (!contentElement) contentElement = document.createElement('p');
  if (!targetMeasure) targetMeasure = 66;
  if (!maxSize) maxSize = 16;
  if (!minSize) minSize = 9;

  var sizer = contentElement.cloneNode();

  sizer.style.cssText = 'margin: 0; padding: 0; color: transparent; background-color: transparent; position: absolute;';