Untitled

<!doctype html>
<script>
function bar(){
    baz = document.getElementById('foo').value;
    alert((baz.match(/r/) && 'CR') + ' ' + (baz.match(/n/) && 'LF'));
    document.getElementById('foo').value = "foonbar";
}
</script>
<body onload="bar()">
<form><textarea id="foo" name="foo">

</textarea>
<input type="submit">
</form>
</body>

lines = foo.value.split(/rn|r|n/);