/** IE implementations and hacks
*   @author: James Diacono
*   @date: 17th of June, 2010
*   @requires: none
*/

// Implement Array.indexOf functionality if missing
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function (elt/*, from*/) {
        var len = this.length >>> 0;

        var from = Number(arguments[1]) || 0;
        from = (from < 0)
            ? Math.ceil(from)
            : Math.floor(from);
        if (from < 0)
            from += len;

        for (; from < len; from++) {
            if (from in this &&
            this[from] === elt)
                return from;
        }
        return -1;
    };
}

// document node constants
if (!document.ELEMENT_NODE) {
  document.ELEMENT_NODE = 1;
  document.ATTRIBUTE_NODE = 2;
  document.TEXT_NODE = 3;
  document.CDATA_SECTION_NODE = 4;
  document.ENTITY_REFERENCE_NODE = 5;
  document.ENTITY_NODE = 6;
  document.PROCESSING_INSTRUCTION_NODE = 7;
  document.COMMENT_NODE = 8;
  document.DOCUMENT_NODE = 9;
  document.DOCUMENT_TYPE_NODE = 10;
  document.DOCUMENT_FRAGMENT_NODE = 11;
  document.NOTATION_NODE = 12;
}

// document.importNode functionality
if (typeof document.importNode !== 'function') {
    document.importNode = function (node, allChildren) {
        switch (node.nodeType) {
            case document.ELEMENT_NODE:
                var newNode = document.createElementNS(node.namespaceURI, node.nodeName), i, il;
                /* does the node have any attributes to add? */
                if (node.attributes && node.attributes.length > 0) {
                    for (i = 0, il = node.attributes.length; i < il; i++) {
                        newNode.setAttribute(node.attributes[i].nodeName, node.getAttribute(node.attributes[i].nodeName));
                    }
                }
                /* are we going after children too, and does the node have any? */
                if (allChildren && node.childNodes && node.childNodes.length > 0) {
                    for (i = 0, il = node.childNodes.length; i < il; i++) {
                        newNode.appendChild(document.importNode(node.childNodes[i], allChildren));
                    }
                }
                return newNode;
                break;
            case document.TEXT_NODE:
            case document.CDATA_SECTION_NODE:
            case document.COMMENT_NODE:
                return document.createTextNode(node.nodeValue);
                break;
        }
    };
}