function startUpload() {
	document.getElementById('f1_upload_process').style.visibility = 'visible';
	document.getElementById('f1_upload_form').style.visibility    = 'hidden';
	return true;
}

function stopUpload(success) {
	var result = '';
	if (success == 1) {
		document.getElementById('f1_upload_ok').style.visibility = 'visible';      
	}
	else {
		document.getElementById('f1_upload_nok').style.visibility = 'visible';      
	}

	document.getElementById('f1_upload_process').style.visibility = 'hidden';
	document.getElementById('f1_upload_form').style.visibility    = 'hidden';      
	return true;
}