Try adding ?value=25 on to the window.open function.

javascript Syntax (Toggle Plain Text)

<a href="javascript:void(0);" onclick="window.open ('my_form.php?value=25','linkname','height=465, width=400, left=550, top=150, scrollbars=no')">Click Here</a>

<a href="javascript<b></b>:void(0);" onclick="window.open ('my_form.php?value=25','linkname','height=465, width=400, left=550, top=150, scrollbars=no')">Click Here</a>

I have done something like this previously and it has worked.

Great idea. I tried that, and for some reason, it didn't work.

How are you calling the variable in PHP on my_form.php?

//this will set $value to the $_GET variable 'value' if it is there else set it to default of 'NOTHING POSTED'
$value = (isset($_GET[value])) ? $_GET[value] ? 'NOTHING POSTED';

//do something with $value
echo "Your age is ". $value;

Well, in the past, I haven't had to call it other than it's already set in a variable. Usually, when I create a link like "my_link.php?value=3", then in the page, my_link.php, I can simply echo $value, and it would echo "3". But I'll try what you've put.