Function getContentWidth

src/prototype/dom/layout.js:47–56

(element, context)

  // But this means it doesn't handle edge cases. Use it when you know the
  // element in question is visible and will give accurate measurements.
  function getContentWidth(element, context) {
    var boxWidth = element.offsetWidth;

    var bl = getPixelValue(element, 'borderLeftWidth',  context) || 0;
    var br = getPixelValue(element, 'borderRightWidth', context) || 0;
    var pl = getPixelValue(element, 'paddingLeft',      context) || 0;
    var pr = getPixelValue(element, 'paddingRight',     context) || 0;

    return boxWidth - bl - br - pl - pr;
  }

  if (!Object.isUndefined(document.documentElement.currentStyle) && !Prototype.Browser.Opera) {
    getRawStyle = getRawStyle_IE;