IE-inspired convenience wrappers for document.evaluate

gistfile1.js

if ((typeof Node != 'undefined') && !document.selectNodes) {
  Node.prototype.selectNodes = function(xpath, resolver) {
    var contextNode = this.ownerDocument || this, result = [], i = 0, node
        ,nodes = contextNode.evaluate(xpath, contextNode, resolver || null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    while (node = nodes.snapshotItem(i++)) {
      result.push(node);
    }
    return result;
  };
  Node.prototype.selectSingleNode = function(xpath, resolver) {
    return document.evaluate(xpath, this.ownerDocument || this, resolver || null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
  };
}