Hi .
 You need to use client side scripting(javascript) for this
example

<html>
<head>
<script>
        function validateForm(){

          if (( document.testForm.txt1.value=="") ||(
document.testForm.txt2.value=="") || (document.testForm.txt3.value=="") ){
                 alert("please enter all values to continue");
            return false;
                }
        else {
 document.testForm.submit();
        return true;
       }
        }
</script>
</head>
<body>
 <form name="testForm" action="nextServlet" >
    <input type="text" name="txt1" ><br>
    <input type="text" name="txt2" ><br>
    <input type="text" name="txt3" ><br>
    <input type="submit" name="bttn" value="test" onClick="return
validateForm()">

</form>
</body>
</html>

> -----Original Message-----
> From: Rakesh Bhat [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, September 05, 2000 8:49 AM
> To:   [EMAIL PROTECTED]
> Subject:      How to validate?
>
> Hi all,
>
> I want to do  the following task.Pls tell me how can i achieve it.
>
> 1)I have 3 input boxes.
> 2)I want the user to enter the value in all the input boxes.
> 3)If the user leaves a box unfilled , i want to indicate him  that the
> field cannot
> be left as it is after he submits.(I want the previous values that he
> filled in
> other input boxes to stay as it was.)
>
> I am writing this in JSP. Do I need to use java script to validate? What
> r the
> steps i need to follow ?
>
> Thx in advance
> Rakesh
>
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>
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Some relevant FAQs on JSP/Servlets can be found at:

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