Runtime class gets implemented by each upload runtime.
[static] Initializes the upload runtime.
function init(uploader:Uploader, callback:function):void
Initializes the upload runtime. This method should add necessary items to the DOM and register events needed for operation.
||Uploader instance that needs to be initialized.
||Callback function to execute when the runtime initializes or fails to initialize. If it succeeds an object with a parameter name success will be set to true.