Exclude certain characters using RegEx

Try as I might, I can't get a RegEx to exclude space or single quotes. - The string "abc" is allowed - Not allowed: "a'bc", "'", "'abc", "'''", "abc''" etc - Spaces could replace the ' too in the above example - Trailing and leading spaces are assumed to be removed already - Empty strings are checked elsewhere - Target language is javascript I'd use PATINDEX if I was in SQL. Or NOT a positive match on either space or single quote, if I could negate... I've tried (for single quote only) - `\w*[^']\w*` - `^\w*[^']\w*$` - others I forget now Please put me out of my misery so I can sleep tonight. Edit: - Target string will not be surrounded by Quotes. I thought thy might add clarity - If "Target language is javascript" is wrong, then it's c#. I'd have to check where we do the validation exactly: client javascript or server c#