How do I make a Flash Banner transparent so it appears below a dHTML menu?

Flash objects need to be given a parameter like '<param NAME="wmode" VALUE="transparent">' in order to help properly appear behind a dHTML menu or ajax popup (lightbox, for example).

To add this parameter to a Flash Banner in OpenX:

1. Add the flash file into OpenX as a Local Webserver banner

2. After adding the banner, go back to the main banner properties. There will now be an additional field called "Transparent background" -- set this to Yes and submit the form.