'method' Example
<html> <body> <script language=javascript> function function1() { document.getElementById("myForm").method = "post"; } </script> <form name="myForm" method="get" action=""> <textarea rows="3" cols="200"> </textarea> </form> <input type="button" value='Change the mode of transferring the data to "post"' onclick="function1();"> </body> </html>