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Answer 1

+4 A:

amphetamachine 2010-05-11 16:08:30

Vertical tab! That's a good one. I'll try that.

noah 2010-05-11 20:28:21

Windows never used carriage return without a new line after it; it always uses both in succession. You're thinking of old Macs.

Michael Madsen 2010-05-11 21:24:38

So the problem with whitespace characters is that the DOM will normalize and otherwise mess with them, so they can't be reliably found later. VTs tend to get converted to spaces in the DOM.

noah 2010-05-12 14:10:49

@Michael Madsen - That's what I meant; as `foo\x{0d}\x{0a}bar` is the Windows-standard line formatting method and would not match `/\x0d(?[^\x0a]*)\x0d`. Kudos on recalling the old Mac encoding! Ever tried `type`-ing a file in that encoding on a Windows terminal? Prints all on one line! :-)

amphetamachine 2010-05-12 17:48:16

Answer 2

+2 A:

The best thing that I shall like to insert, which is not visible on the browser, will be a pair of tags with some special id, like <span id="delimiter" class="Delimiter"></span>. This will not show up on the content, while this can be present in the doc. You don't need to remove them.

Kangkan 2010-05-11 16:08:57

Sorry, forgot to mention that the strings appear in attributes too, so the tags will end up encoded.

noah 2010-05-11 20:27:48

Answer 3

+3 A:

&zwnj; - zero-width non-joiner (see http://htmlhelp.org/reference/html40/entities/special.html)

On the off chance that this already appears in your text, double it up (eg: &zwnj;&zwnj;mytext&zwnj;&zwnj;

Edit in response to comment: works in Firefox 3. Note that you have to search for the Unicode value of the entity.

<html>
<body>
    <div id="test">
        This is a &zwnj;test
    </div>

    <script type="application/javascript">
        var myDiv = document.getElementById("test");
        var content = myDiv.innerHTML;
        var pos = content.indexOf("\u200C");
        alert(pos);
    </script>
</body>
</html>

Anon 2010-05-11 20:37:29

Good idea, but that entity doesn't show up in the innerHTML, so I can't actually find it.

noah 2010-05-12 14:13:50

Perfect! That code does the trick.

noah 2010-05-13 17:26:12

Answer 4

A:

You could use LTR marks. Is this for some sort of XSS testing? If so, this might be of interest: Taint support for PHP

Tgr 2010-05-11 21:20:51

Not XSS realated. What are LTR marks?

noah 2010-05-12 13:21:39

They mark left-to-right writing direction in Unicode. They have no effect when the language is left-to-right anyway.

Tgr 2010-05-12 16:00:35

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Invisible Delimiter for Strings in HTML

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