layout.css advice

[Guest Fuzquia]

I had an ad banner added under my homepage header some time ago by a web designer. I am looking to change the current .jpg that is displayed to a flash header. At the moment I have been able to find the following in my layout.css document:

#adbanner {

text-align: right;

height: 116px;

margin-bottom: 10px;

padding-right: 9px;

padding-top: 0px;

background-image: url(../styleImages/backgrounds/adbanner.jpg);

border-bottom: 1px solid #777070;

}

This is all I can find related to this banner. Can anyone advise how I go about changing the "background-image" part to display a flash header? Could I simply change the file name to my flash file? Any help greatly appreciated...