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How do i sum &nbsp;up 3 fields while inserting into the database. I have 3 fields <br />
ext.1<br />
ext.2<br />
ext.3<br />
total ext. <br />
I need the total ext to sum up the three previews fields and pop up automatically on mouse over.<br />
total ext = ext.1 + ext.2 + ext.3<br />
<br />
any suggestion?
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How do i sum  up 3 fields while inserting into the database. I have 3 fields 
ext.1
ext.2
ext.3
total ext. 
I need the total ext to sum up the three previews fields and pop up automatically on mouse over.
total ext = ext.1 + ext.2 + ext.3

any suggestion?

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