text: goog.provide('ol.dom');
  
  
  /**
   * Create an html canvas element and returns its 2d context.
   * @param {number=} opt_width Canvas width.
   * @param {number=} opt_height Canvas height.
   * @return {CanvasRenderingContext2D} The context.
   */
  ol.dom.createCanvasContext2D = function(opt_width, opt_height) {
    var canvas = document.createElement('CANVAS');
    if (opt_width) {
      canvas.width = opt_width;
    }
    if (opt_height) {
      canvas.height = opt_height;
    }
    return canvas.getContext('2d');
  };
  
  
  /**
   * Get the current computed width for the given element including margin,
   * padding and border.
   * Equivalent to jQuery's `$(el).outerWidth(true)`.
   * @param {!Element} element Element.
   * @return {number} The width.
   */
  ol.dom.outerWidth = function(element) {
    var width = element.offsetWidth;
    var style = element.currentStyle || getComputedStyle(element);
    width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);
  
    return width;
  };
  
  
  /**
   * Get the current computed height for the given element including margin,
   * padding and border.
   * Equivalent to jQuery's `$(el).outerHeight(true)`.
   * @param {!Element} element Element.
   * @return {number} The height.
   */
  ol.dom.outerHeight = function(element) {
    var height = element.offsetHeight;
    var style = element.currentStyle || getComputedStyle(element);
    height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);
  
    return height;
  };
  
  /**
   * @param {Node} newNode Node to replace old node
   * @param {Node} oldNode The node to be replaced
   */
  ol.dom.replaceNode = function(newNode, oldNode) {
    var parent = oldNode.parentNode;
    if (parent) {
      parent.replaceChild(newNode, oldNode);
    }
  };
  
  /**
   * @param {Node} node The node to remove.
   * @returns {Node} The node that was removed or null.
   */
  ol.dom.removeNode = function(node) {
    return node && node.parentNode ? node.parentNode.removeChild(node) : null;
  };
  
  /**
   * @param {Node} node The node to remove the children from.
   */
  ol.dom.removeChildren = function(node) {
    while (node.lastChild) {
      node.removeChild(node.lastChild);
    }
  };
  