fill combobox at runtime jsp

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fill combobox at runtime jsp

i have 1 combobox in jsp which is filled with value from sql db on load of form

<% Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection cn = DriverManager.getConnection("jdbc:odbc:mydsn");; Statement s = cn.createStatement();

       ResultSet re = s.executeQuery("select distinct From1 from station");
   %>

    <select>
    <%
     while (re.next()) {
        String un = re.getString("From1");
     %>
     <option value="<%= un%>"><%= un%></option>
    <%
    }
     %>
     </select>

i have another combobox below it, i want it to be filled on the basis of selected value of 1st combobox...plz help with code

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