2)After decimal point,it should take only two should not take more than two digits.
Somebody asked me this today on a support call so I did a few quick lookups online and found the solutions listed rather unsatisfying.
Email validation checks the following points Figure 2: Above two figures are example of valid and invalid emails.
This is validation to check that entered values are all letters or combination of different chars.
This tutorial shows both validation and accepting only numbers in a textbox.