Help about send string via POST

Hi all,
I have a problem when trying to send data through POST method.

<select name=\"state\">
<option ".($state eq 'NER' ? 'SELECTED' : '').">NEW,ESTABLISHED,RELATED</option>
</select>

when i submit, the data was:

&state=NEW%2CESTABLISHED%2CRELATED&

Some special character was inserted.How do i preserve the origin string?

You inserted the special characters yourself. http://en.wikipedia.org/wiki/Percent-encoding#Percent-encoding_in_a_URI