stackoverflow question 16781505

<!DOCTYPE html>
<html>
<head>
<style>

</style>
<title> </title>
</head>
<body>
<script>
var txt = "<TAG>keeep mee!<foo>throw me away D:</foo>keep me too!!</TAG>";
document.body.innerText = txt+"\n\n"+txt.replace(/(<f.*><.*o>)(?=<)/g,"");
</script>
</body>
</html>