Insert text into texarea field

[Andrzej]

Hallo Everybody

My question is:
Is there any way to insert text (which comes from another table) into <textarea> field.

I can manage the situation when insted of <textarea> field I have simple

<td><span id="description"></span>&nbsp;&nbsp;</td>

and to fill the description field I do as follows:

$['description'].innerHTML='<?php $descr_comes_from_template_table; ?>'

I works ok, but ofcourse I am not able to edit just entered description text.
Could you suggest me another way how to implement my case by ajax technology.

to sum up
I need fill in a <textarea> filed with text which comes from another table.
After filling the <textarea> an users should be able to modify just filled template text.

Thanks in advance
Andrzej