How to get the checkboxes with in javascript asp.net

Question

Hi Every one,

I am developing one web application in asp.net.,

In that application I have one checkbox(Is Negative marking).

when I check that check box one text box will display and I have to enter Minus marks.

and when I uncheck that checkbox the textbox will not display.

I need to write the code in javascript only.

so can u please explain how do that ?


Thanks in advance.

Lakshmi,