Unusual html codes

Hi All,

I have a web form for user to input data.
The data is then put into an Oracle 10g database.
Problem is that there are some sort of codes put in.

I.e. ：

Any idea what char the user was trying to input?

Thanks

After I.e in above question I had ：
with an ; after it, i cant seem to put this in the forum, it outputs : no matter what!!!
It actually output the char I wanted ":".
Ha ha.

That is a Unicode for the colon as per this link:
http://www.orwell.ru/test/Unicode/_?103