help with spoiler bbcode i'm trying to make

[kh99]

<input> with type="image" is a submit button, so it's sumitting the form that encloses it (which does moderation). I think if you add "return false;" to the code in the onclick (add a semicolon after the existing code, of course) you can stop it from submitting. I think you could also just change it to an <img> tag since that allows an onclick parameter.