How to get the text from textarea in HTML and store it in database using javascript and jsp

<script>
function str()
{

<%

Class.forName("org.postgresql.Driver");
   con=DriverManager.getConnection("jdbc:postgresql://localhost:5432/test","postgres","123");

String rm = request.getParameter("remark");
alert("rm");


    Statement st=con.createStatement();
    st.executeUpdate("INSERT INTO test.public.list VALUES('"+rm+"')");



    %>

}
</script>