ix");

test(function() {
  var HTMLNS = "http://www.w3.org/1999/xhtml";
  var element = document.createElementNS(HTMLNS, "html:SPAN");
  assert_equals(element.namespaceURI, HTMLNS);
  assert_equals(element.prefix, "html");
  assert_equals(element.localName, "SPAN");
  assert_equals(element.tagName, "HTML:SPAN");
  assert_true(element instanceof Node, "Should be a Node");
  assert_true(element instanceof Element, "Should be an Element");
  assert_true(element instanceof HTMLElement, "Should be an HTMLElement