Geting response on same JSP page

hi everybody
i want to select an item from dropdown box and want to display
all data related with this selected item on same jsp page
plz help me out
thx in advance

hi friends
i am a newbie to java, i have some problem, can any one help me out?
my form has few entries like
USERNAME(text field),
PASSWORD(text field),
COUNTRY(select field - drop down list box),
STATE (select field -drop down list box) n so on
i have successfully populated countries list in the drop down list box taken from database dynamically using jsp
"HERE COME THE COUNTRY CODE"
<select size="1" name="country">
<option selected value="Select">Select</option>
<%
while(rscoun.next())
     String coun=rscoun.getString(1);
     %>
     <option value ="<%=coun%>"><%=coun%></option>
     <%
     } %>
</select>
now when the user selects the country (say INDIA) , states list should be populated dynamically depending on the user selection
and all this should happen on the same page
please let me know how to achieve this , i need the help badly
thanks inadvance
kind regards
suman

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