Refer demo http://phpgrid.org/demo/demos/editing/js-validation.phps

Line 98, 146

It uses custom JS function for field validation. You can change the IF condition to stop these characters using regex or JS code.

hi abu,   i refered this sample but i could find the function for only alpha numeric data.I would like to use like regular expression or preg_match

You can refer this link:

https://stackoverflow.com/questions/7753365/php-preg-match-only-allow-alphanumeric-strings-and-characters