General Flash Specifications

• Loading files from cross domains is not permitted for security reasons.
• The frame rate for flash files may not exceed 24 frames per second. 18 frames per second is preferred. For more information, please read "SWFs with High Frame Rates May Slow System Performance".
• Non-user-initiated audio is not permitted in flash ads.
• Audio may be activated on any user click. Activation on rollover is allowed with the following restrictions:
  1. On rollout audio must immediately stop.
  2. A 1 second delay between rollover and the start of the audio is required.
  3. Yahoo!7 may reject ads which include audio on rollover that has a negative user experience.

There are usually three components to a polite download ad:

1. The alternative image (either GIF or JPG), with a 20k maximum.
2. An initial Flash file, with a 30k maximum.
3. The Flash file to be politely downloaded, with an 100k maximum

Animation

• Animation may run for 15 seconds (looping permitted). No strobing effects within banners are allowed.

HTML

• HTML code cannot exceed 3k.
• 2 images maximum, total file size of images cannot exceed 20k.
• Client-side imagemaps are acceptable and must be provided by the client.
• Forms tags in HTML code must use "get" in the method.

HTML/DHTML/Javascript Ad

• All Javascript creative is reviewed on a case-by-case basis. Javascript code cannot exceed 3 kbytes.
• If Javascript code exists with HTML, then the total filesize cannot exceed 3 kbytes.
• Javascript files may be referenced remotely in which case the remote javascript file can be a maximum of 6 kb.
• 2 images maximum, total file size of images cannot exceed 20kbytes.
• All actions must be initiated by user click. No mouseover starts.

Linking URL

• Linking URLs must be domain name based and cannot be the IP address (i.e., http://207.123.456.78 )

Java

• All Java creative is reviewed on a case-by-case basis.
• Javascript and HTML accompanying the Java applet must not exceed 3kb in file size.
• All actions must be initiated by user click. No mouseover starts.
• Yahoo must be able to track user click-thrus. Yahoo!7 will help advise developers on how to implement this.
• Java banners may not exceed 50K. This includes all primary and supporting files (.gif/.cab/.jar etc.).

Rich Media Vendors/Third Party Servers

At present most of the rich media run on Yahoo!7 properties is run through Eyeblaster, and their approved products are well tested on our network. Yahoo! has relationships with many excellent Rich Media vendors world-wide and we will attempt to accommodate any need your campaign has. If you would like to use another vendor please talk with your Account Manager to arrange testing and ensure your campaign is handled appropriately. Rich Media run on the Yahoo!7 homepage cannot be third party hosted.