how can i make this code as bbcode

[dahdoh]

hi

i wanna make that code as a bb code
<input class="button" onclick="showSpoiler(this);" type="button" value="here" />

to see how this code work enter that forum
http://www.montada.com/showpost.php?p=5253240&postcount=91

look at his signature u will see some boxex when u clock on it u can see an image

so how we can do same like that
?

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