Straight from the Docs (http://docs.jquery.com/Selectors)
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Note: if you wish to use any of the meta-characters described above as
a literal part of a name, you must escape the character with two
backslashes (\). For example:
#foo\\:bar
#foo\\[bar\\]
#foo\\.bar
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So to select
<input type="text" id="test:name">
it would be:
$("input#test\\:name")
