pass param from JSTransferStarted

[truongvu]

I have param below
document.writeln('<PARAM NAME="param4" VALUE="tagname">');
document.writeln('<PARAM NAME="value4" VALUE="+ data_pass +">');
When i change variable 'data_pass' from jquery , it not change when i send to PHP script.
How can i change it ! Can I pass it from JSTransferStarted ?
Thanks .

[support]

You have to cal: document.fileupload.setExtra("name", "value");