Function toDecimal

src/prototype/dom/layout.js:5–9

(pctString)

  // Converts a CSS percentage value to a decimal.
  // Ex: toDecimal("30%"); // -> 0.3
  function toDecimal(pctString) {
    var match = pctString.match(/^(\d+)%?$/i);
    if (!match) return null;
    return (Number(match[1]) / 100);
  }

  // A bare-bones version of Element.getStyle. Needed because getStyle is
  // public-facing and too user-friendly for our tastes. We need raw,