Flash always ontop of page content.

I had this problem today with Flash (SWF) content appearing ontop of a JTip popup. I tried changing the z-index within the CSS, but it didn't work, it took me a long time to discover what needed to be done to fix it, but basically it was quite easy;

1. Add the following parameter to the OBJECT tag:

<param name="wmode" value="transparent">

2. Add the following parameter to the EMBED tag:



The dangers of global variables revisited because of PHP.

In 1985 after about two years of full time programming I had an epiphany; realising that global variables are a very bad idea. Roughly 20% of the bugs that I kept finding were down to abuse or misuse of global variables, so I stopped using them, apart from the time when you really should use one (e.g. for a pointer to global shared memory that never changes).

So here I am over 20 years later, and I've just realised exactly the same thing, except this time it's in PHP not 'CORAL' '66'.