on dropdown value select textbox show sow some value

Brother,
Firstly i need to rephrase your question,
1>Your dropdown contains two options: 1>Credit 2>Debit.
2>If select credit, then a check box should appear, if i check that check box a textbox will appear. In that you enter the amount to be credited.
3>Same goes for debit. If i check the checkbox then a textbox appears, now you enter the value to be debitted.

Problem Area:
1>When you select Credit some amount shows(the last entered amount).
2>But when you select Debit no amount appears.

My doubt : 1> Do you want the debit box to show an amount or not?
OR
2> Is it not showing any amount?
3> what have you tried? I want to see some code or some algorithm, what is your scheme to go about it?

- Rahul

So what is you problem?
You should describe better your problem by specifying what should be and where is the problem now!

i am unable to get your problem.please put your code here or describe more details