d3_selectionPrototype.style = function(name, value, priority) {

  if (arguments.length < 3) priority = "";

  // If no value is specified, return the first value.

  if (arguments.length < 2) return window

      .getComputedStyle(this.node(), null)

      .getPropertyValue(name);

  function styleNull() {

    this.style.removeProperty(name);

  }

  function styleConstant() {

    this.style.setProperty(name, value, priority);

  }

  function styleFunction() {

    var x = value.apply(this, arguments);

    if (x == null) this.style.removeProperty(name);

    else this.style.setProperty(name, x, priority);

  }

  return this.each(value == null

      ? styleNull : (typeof value === "function"

      ? styleFunction : styleConstant));

};