apache - Allow to send Javascript Code with Method Post in PHP -

i have problem submitting form app.

i need send javascript code form controller page. code in html like:

<form method="post" action="controller/mycontroller.php">     <textarea name="code"></textarea>     <input type="submit" value="send" /> </form> 

if send on textarea "hello world" example, controller works fine, if try send javascript code alert(1); forbidden message server.

any solution send javascript code server string filters or allowing on .htaccess file?

thanks!

re-edit: test example: http://pruebas.intelectiva.biz/test/

you must convert @ first text of textarea javascript replace code brakets random letters never use.

<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script> <script> $(document).ready(function() {     $("#send").click(function(event) {         event.preventdefault();          var code = $("#code").val();          code = code.replace(/\(/g, "^)·(");         code = code.replace(/\{/g, "=?¿¡12");         code = code.replace(/\</g, "++ççcsacsa");          $("#code").val(code);         alert (code);          $("#form").submit();     }); }); </script> 

and then, in server side reconvert text desired text:

<?php $code = $_post['code']; $code = str_replace('^)·(', '(', $code); $code = str_replace('=?¿¡12', '{', $code); $code = str_replace('++ççcsacsa', '<', $code); echo '<script>'. $code . '</script>'; ?>