<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'>
var parser = new DOMParser(),
str = "<!DOCTYPE html><html><head><title>Test</title></head><body><div id='div1'>asdf</div></body></html>",
doc = parser.parseFromString(str, "application/xml");
console.log(doc.getElementById("div1").textContent);
</script>
</head>
<body>
</body>
</html>