jquery ajax question?

[petre]

i made a form and i want it to post on the page without refreshing but i dont get what im doing wrong, because it doesnt work.
here is the form:


<form action="">

<textarea id="message" rows=5 cols=100 wrap="physical"></textarea>

<input type="submit" value="send" id="button"/>

</form>



here is the jquery script:


$(function(){

$("#button").click(function(){

var message= $("#message").val();

$.ajax({
type: "POST",
url:"index.php",
data: message,
success: function(){
alert("it wroks:")+ message; //so i know if it works, but it doesnt.
}
});
return false;
};
});


and the php that handles and shows the post:



<?php

$arival=$_POST['message'];

echo $arival;

?>



im doing something wrong, but i really dont know what.