I've created a simple form that allow to insert a word and search it into a database

PHP Code:
<form method="post" action="cerca_ragione_sociale.asp">
 <
label>Inserisci ragione sociale</label>
   <
input name="chiave"/>
  <
label
  
  <
input type="submit"/>
</
form
the problem is that the result is opened into a new page, while i want to show it in the same page of the form

I want to precise that i can do it throught javascript, but what i want to know if is it possibile to do it simple changing come parameter of the submit button.