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

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>