best way to check if button pressed and text box as no value

I'm not sure you can get much better than what you have.

aminerd,
Values processed by form is always STRINGS. So if you'll use type-sensitive === operator then you'll have some troubles.

For example:
<form>
<input type="text" name="int" />
<input type="submit" value="go" />
</form>

if you'll enter 123 to this form and press submit button, you'll have:
$_GET['int'] = '123';
not integer 123, but string '123':

<?php
if ($_GET['int'] === 123) { echo 'This won't work anyway!'; }
if ($_GET['int'] === '123') { echo 'This works!'; }
if ($_GET['int'] == '123') { echo 'And this works!'; }
if ($_GET['int'] == 123) { echo 'And this works too!'; }
?>

If you will not input anything in that field, then $_GET['int'] will be '', not NULL:
<?php
if ($_GET['int'] === NULL) { echo 'This won't work anyway!'; }
if ($_GET['int'] === '') { echo 'This works!'; }
if ($_GET['int'] == '') { echo 'And this works!'; }
?>

And if you'll put false (or true) in that field, it will also be 'false' or 'true', noy bollean false ore true:
<?php
if ($_GET['int'] === false) { echo 'This won't work anyway!'; }
if ($_GET['int'] == false) { echo 'This won't work too!'; } // Note this!
if ($_GET['int'] === 'false') { echo 'This works!'; }
if ($_GET['int'] == 'false') { echo 'And this works!'; }
?>

Hi all

what would be the simplyes method to do that as i dont know javascript at all

thanks all for your input

You cannot rely on javascript solely. Mazzachre should know better.

There are plenty people who are not using javascript and therefor can enter unvalidated data unless you also validate serverside.

-r-