Write jscript Software

Very Small project max bid $20.00 The page: [login to view URL] I want to change the way calculations are started. If the user selects the combo before entering numbers nothing happens The fix: user has made a selection from the combobox before entering numbers. Userenters a number user enters 5 nothing hapopens user enters 6 nothing hapopens user enters 3 textbox now contains 563 is the more than the minimum 100 required if combobox text is not "Select Pitch" then a selction has been made do calculation user enters more numbers(with each entry recalculate numbers) as they are typed. consideration: user may backspace to where the textboxs value is less than 100 then recolor label to red Reset output numbers to "Na" Do not reset combo if a selection has been made or change <h3>tag