coded JPG or MP3. Preferably <code>ByteArray</code>
		 </td></tr><tr><td class="paramSpacer">&nbsp;</td></tr><tr><td width="20px"></td><td><code><span class="label">onComplete</span>:Function</code> (default = <code>null</code>)<code></code> &mdash; function - must accept one argument: server response <code>Object</code> (JSON strings are parsed autumatically) or <code>Error</code> 
		 if request was unsuccessful. Asign your own <code>onProgress</code> if you need to.
		 </td></tr><tr><td class="paramSpacer