Originally posted by raymond yadao:
Originally posted by Marilyn deQueiroz:
Call the getParameter() method on req and check whether the input is null or has a length of zero on all of the text boxes.
but this can only be done as soon as u click the submit button. what i want is that, from the client browser it will check now if all the text boxes are fill up. so if it find that one has been leave blanks it will alert the user that some text boxes has not been leave blank.