function cssValueToPixels(val) {

    if (val === '0' || common.isUndefined(val)) return 0;

    var match = val.match(CSS_VALUE_PIXELS);

    if (!common.isNull(match)) {
      return parseFloat(match[1]);
    }

    // TODO ...ems? %?

    return 0;

  }
@returns {Boolean} true if the value has deviated from initialValue