Error messages

[ShaolinF]

Hi Guys,

 

What I want to do is a have a text box on a page and if the user hasnt filled out this text box and presses continue the following text will be written "Please enter something into the text box". How can I do this ?

[Devine]

<?php

$textbox=$_POST['textbox'];

if($textbox==""){
  echo"
  <form action='?' method='post'>
  <textarea cols='20' rows='4' name='textbox'>
   $textbox
  </textarea>
  </form>
  ";
  }else{
  echo"You listened to me ";
  }

[corbin]

You could also do it with Javascript (I would do it with PHP too if you were going to do it with javascript):

 

<script language="javascript">
<!--
function Submitted(form) {
if(form.textbox.length < 1) {
alert('Please enter something in the textarea.');
return false;
}
return true;
//not sure if textbox.length is the right format.... I don't use javascript to validate forms very often
//also, you could alter a div or just plain write something if it failed instead of alerts, which are like insanely annoying to me
}
//-->
</script>

<form action="" method="POST" onsubmit="return Submitted(this);">
<textarea name='textbox' id='textbox'>

</textarea>
</form>

[ShaolinF]

Thanks for the imput guys but I don't know how to implmenet it within html.

 

Here is my textbox:

<p>Character string shown: <input type="text" name="validator" id="validator" size="20" /></p>

 

And my submit button:

<button type="submit" value="Continue">Continue</button>

[marcus]

What corbin did you can just do:

 

<form name="submit" method="post" action="page.php" onSubmit="Submitted(submit)">
<textarea name="textbox" cols="30" rows="14"></textarea>
<br><input type="submit" value="Submit">
</form>