Netbeans根据另一个dropdownlist html netbeans填充下拉列表

Question

i have an interface where i have two dropdownlists in html,one is mark(marque) of a phone and another is model.so the one of mark works fine(callin data from database(sql)) but i want that each time i choose the dropdown list of model it should not show the whole list of data concerning models from the database but just specific for the marque chosen without refreshin the page.like if i choose the mark Nokia it will automatically show just models of nokia not samsung or any other phone mark! i dont know if mayb its sql on model as in the table model i have (model_tel,marque_tel(which is a foreign key from marque_tel)) so i tryed to use the where command for sql but its not workin because i want to say where marquel_tel='//the marque chosen in the marque dropdownist//' but i dnt know how to do that in java (html)

the problem is i dont no much about javacsript or ajax.......so if any of u can help it would really mean alot

heres how the example of the code looks like so far(i just wwent straight to the main point here):

<label>Marque:

 <span class="small">selectionner la marque</span></label>

<%ResultSet rst = in.executeQuery("select distinct(Marque_Tel) from Marque_Tel");%> 

<table id="d"><tr><td id="k">
       <select name="marque" id="marque"  onchange="displayDate(this)">
       <% while (rst.next()) {%>
       <option></option>
      <option><%=rst.getString(1)%></option> //showin marksfrom data of sql//
      <% }%>`

   </td></tr></table><br><br><br>
            <label>Modele:
           span class="small">selectionner le modele</span></label>
            //callin phone models from sql database down here//

            <%ResultSet rs = in.executeQuery("select * from Modéle_Tel where           
      marque_tel='"+rst.getString(1).toString()//but this in not workin//"' ");%>

     <select name="modele" id="modele" >
       <% while (rs.next()) {%>
       <option></option>
      <option><%=rs.getString(1)%></option>//callin phones models
           </select>

                <button type="submit">VALIDER</button>  </html>

Answer 1

You have to use Ajax for this problem. You cant get populated dropdown list based on another dropdown list without refreshing the page. So, the only option is to use Ajax .