[Jon12345]

That's kind of you vbenhancer. Actually, I think I am starting to understand this a little better, thanks to your guidance!

Lets take an example and perhaps someone can confirm if I have got this right or not. I am on mytemplate.php and I want to check for the value of a variable in the url. mytemplate.php?do=dog and mytemplate.php?do=cat

Here is my code:

if ($_POST['do'] == 'dog')
{
    // Run my javascript
}

if ($_POST['do'] == 'cat')
{
    // Run my javascript
}

Is that right? Or will that not run because it looks like raw php to me, rather than vbulletin code. Comments?