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<head>
<title>DOM Traversal: NodeIterator: Removal of an ancestor of the Reference Node (backwards)</title>
<script type="text/javascript"> <![CDATA[
var errors = 0;
var log = '';
function doTest() {
var iterator = document.createNodeIterator(document.getElementById('root'), NodeFilter.SHOW_ALL, null, false);
var root = document.getElementById('root');
var A = document.getElementById('A');
var B = document.getElementById('B');
var BB = document.getElementById('BB');
var C = document.getElementById('C');
check(iterator.nextNode(), root);
check(iterator.nextNode(), A);
check(iterator.nextNode(), B);
check(iterator.nextNode(), BB);
check(iterator.previousNode(), BB);
remove(B);
check(iterator.nextNode(), C);
if (errors)
document.getElementById('result').firstChild.data = 'FAIL: ' + errors + ' errors:\n' + log;
else
document.getElementById('result').firstChild.data = 'PASS';
}
function check(a, b) {
if (!a) {
errors += 1;
log += 'Found null but expected ' + b + ' (' + b.id + ').\n';
} else if (a != b) {
errors += 1;
log += 'Found ' + a + ' (' + a.id + ') but expected ' + b + ' (' + b.id + ').\n';
}
}
function remove(a) {
if (!a) {
errors += 1;
log += 'Tried removing null node.\n';
} else
a.parentNode.removeChild(a);
}
]]></script>
</head>
<body onload="doTest()">
<pre id="result">FAIL: Script did not complete.</pre>
<p><span id="root"><span id="A"></span><span id="B"><span id="BB"></span></span><span id="C"></span></span></p>
</body>
</html>