LTG,

 

1 - Flash/Silverlight is not a must components. but if the browsers installed it, the uploader would provide better functions.

 

2 - AjaxUploader are compatible with/without Ajax , please check our online samples, the samples can switch Ajax mode.

 

3 - You can use any javascript library , but need understand how AjaxUploader works and make sure the JS code can works with the Uploader.

 

Regards,

Terry