How to upload a picuture from album? After I selected a picture from album,I got the path of  the picture.But how to use it to upload to server?

I can’t specify manually the value of  element “<file>” due to it doesn’t work even I specify a value to it.

I tried another way.Maybe I can upload stream directly.

function readFromStream(fileStream) {
	try {
		fileStream.position = parseInt(document.getElementById('position').value, 10);
		var contents = fileStream.read(fileStream.bytesAvailable);
		fileStream.close();

		Output.append('File contents: <br/>');
		Output.append('<div class="fileContents">' + contents + '</div>');
	} catch (exc) {
		Output.append('File reading exception: ' + exc.message + '<br/>');
	}
}

I can get the fileStream,but how can i use it? Does this method can fix the problem?