escapeJavaScript... v JavaScript

JavaScript uses the \ (backslash) as an escape characters for:

\' single quote
\" double quote
\ backslash
\n new line
\r carriage return
\t tab
\b backspace
\f form feed
\v vertical tab (IE < 9 treats '\v' as 'v' instead of a vertical tab ('\x0B'). If cross-browser compatibility is a concern, use \x0B instead of \v.)
\0 null character (U+0000 NULL) (only if the next character is not a decimal digit; else it’s an octal escape sequence)
Note that the \v and \0 escapes are not allowed in JSON strings.