I have a text input field like text box or text area.
I want to prevent the user from entering certain character or a group of characters.
That is for example if I dont want # \* @ and numbers from 0-9 these characters. 
So Whenever user press any of the above character key then that character should not appear in to an input field.
It means directly blocking that character.

Is this possible in Jquery?
Please give me some guidelines to achive it.

Thank You