joomla2.5 - Joomla simple text area that send data via POST -

i'm developing joomla! 2.5 component.

it, username && password passed via admin area, connect webserver send info via xml.

i can show component in part of front-end without problem.

now need insert, in frontend end-user, single text-area users insert value (e.g., theyr card number [it's loyalty component]) , value must passed previous component.

atm don't need ajax call, page refreshed.

so process must textarea => insert data => press submit => show component result (page refresh, no problem).

i need develop plugin? need "extend" component? saw several topic on web didn't found show (i think) simple case my.

i need hand you, on correct way.

thank you.

in main controller file can access post & values,

where want place input: create form points component, appropriate

<form action="index.php?option=com_yourcomp" method="get"   <input type="text" name="your_text_input"... 

add fields need.

in controller.php of com_yourcomp able access user data

jrequest::getvar('your_text_input') or jinput prefer.

note on method="get": if want users able bookmark page or plan redirect in component. user inputs must limited few thousand chars @ most. otherwise use post, depends on needs.