>>this.value = this.value in Checkbox.click event seems to solve the problem, but now I have another one. After each click the mouse pointer seems to change into hourglass and back.
>>
>>Do you see something similar?
>
>No, and nobody tells me something like that (I mean from out QA department).

I may send you this form and two extra classes needed, so you may see, if you have the same problem (mouse pointer changes to hourglass and back on each click on the checkbox) if you want.