A-/Synchronous use of XMLHttpReqest

Demonstrates a-/synchronous use of XMLHttpRequest. The first chunk of data should arrive after about 1 second, the second part (when multipart) after 3 seconds later.
Mozilla only

Sync Singlepart
Pauses script until data arrives
Sync Multipart
Pauses script until first chunk of data arrives, then resumes, even when there are more chunks of data to come
Async Multipart
The script is not paused

(not really any) further information @ stefan@strain.at