HI ,

If I have a form panel which contains say employee name , last name and salary and tax based on that salary.
Initially I will show all elements except tax .
When users fill up all the details and after saving , at server end I will calculate tax and will come back on same form showing all fields as readable along with tax field.

I mean
1. initially DOM should not contain tax field but later on it should... How can I do that ?
2. How can I show those fields as readable only ..