I'm new to forms and post data ... so I don't know how solve this problem!

I've a php page (page1) with a simple form:

<form method=post action=/page2.php>

<input type=search value=E-Mail Address size=30 name=email />

<input type=submit value=Find E-Mail />

</form>

How you can notice ... this form post the 'email' value to the page2. In the page2 there is a small script that lookup in a database to check if the email address exist.

$email = $_POST['email'];



$resut = mysql_query(SELECT * FROM table WHERE email = $email);

.   

.

.

/* do something */

.

.

.



if($result){

    //post back yes

}

else{

   //post back no

}

I don't know how make the post back in php! And how can I do to the post back data are read from a javascript method that shows an alert reporting the result of the search?

This is only an example of what I'm trying to do, because my page2 make some other actions before the post back.

When I click on the submit button, I'm trying to animate a spinning indicator ... this is the reason that I need to post back to a javascript method! Because the javascript function should stop the animation and pop up the alert with the result of the search!

Very thanks in advance!