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Display States according to Country selection...

Display States according to Country selection...

------we should have two tables in sql-------

table: tblcountry
 create table tblcountry
 (
  countryid varchar(20) primary key,
  country varchar(20)
 )
insert into tblcountry values('1','Canada')
insert into tblcountry values('2','USA')
insert into tblcountry values('3','Nepal')

table: tblState
 create table tblstate
 (
  stateid varchar(20) primary key,
  state varchar(20),
  countryid varchar(20) foreign key references tblcountry(countryid)
 )

insert into tblstate values('1','Alaska','2')
insert into tblstate values('2','Puerto Rico','2')
insert into tblstate values('3','Saint Thomas','2')

--------------run above codes on sql-------------
------------------------------------------------------->

<!-------real coding goes from here-------------------->

<!--#include file="adovbs.inc"-->
<%

 ConnString="Provider=SQLOLEDB.1;Persist Security Info=False;"
 ConnString=ConnString & "User ID=sa;Initial Catalog=master;"
 ConnString=ConnString & "Data Source=computername"

 'give your computer name instead of computername
 'on "Data Source=computername" on above string

 Set Conn=server.createobject("ADODB.Connection")
 Conn.open ConnString

 Set rs=Server.CreateObject("ADODB.RECORDSET")
  rs.Open "select * from tblstate",Conn,3

 Response.write "<script language=javascript>"& vbcrlf
 Response.write "var i=0;" & vbcrlf
 Response.write "stateIDList=new Array();" & vbcrlf
 Response.write "statelists=new Array();" & vbcrlf
 for i=0 to rs.RecordCount-1
  Response.write "stateIDList["&i&"]='" & rs("countryid") & "';" & vbcrlf
  Response.write "statelists["&i&"]='" & rs("state") & "';" & vbcrlf
 rs.MoveNext
 Next
 rs.Close
 Response.write  vbcrlf & "</script>"
strSQL="select * from tblcountry order by country"
rs.Open strSQL,Conn

StrCountry=rs("countryid")

	 Set rsstate=server.createobject("ADODB.RECORDSET")
	 rsstate.CursorLocation=adUseClient
	 strSQL="select * from tblstate where countryid='" & StrCountry & "'"
	 rsstate.Open strSQL,Conn
%>
<html>
<body>
<form name=frm>
<tr height=25>
 <td width=90 class=dblue>
 <font face="Verdana, Arial, Helvetica" size="1" color="darkblue">
   Country
 </font>
 </td>
 <td width="180">
  <font face=verdana,arial size=1.8>
  <select name=cmbcountry onchange="javascript:Loadstate()">
  <Option value="">---------- Select Country --------</Option>
  <% For i=1 to rs.RecordCount %>
  <Option value="<%=rs.Fields("countryid")%>"
  <%if cint(rs("countryid"))=cint(StrCountry) then%>Selected<%End if%>>
  <%=rs.Fields("country")%>
  </Option>
  <%rs.MoveNext
  Next
  rs.Close
  %>
  </select>
  </font>
 </td>
 <td width=90 class=dblue>
  <font face="Verdana, Arial, Helvetica" size="1" color="darkblue">
    State/Province</font>
 </td>
 <td class=dblue width="200">
  <select name="cmbstate" onchange="javascript:BlankState()">
  <%if rsstate.RecordCount<>0 then%>
  <%Do while not rsstate.EOF%>
  <option value="<%=rsstate("stateid")%>"><%=rsstate("state")%></option>
  <%rsstate.movenext
  loop
  else
  %>
 <option value="">------- County/State N/A -------</option>
 <%end if%>
 </select>
 <%
 rsstate.close
 Set RsState=nothing
 Conn.close
 Set Conn=nothing
 %>
 </td>
</tr>
</form>
</body>
</html>
<Script language=javascript>
var k=100;
var m;

function clear_dropdowns()
{
  document.frm.cmbstate.options[0] = new Option('---------------','')
  document.frm.cmbstate.selectedIndex=0
}

function Loadstate()
{
clear_dropdowns();
StatesValue=new Array();

for (var i=k;0<=i;i--)
  document.frm.cmbstate.options[i]=null;
m=0;
for(j=0;j<stateIDList.length;j++)
 {
  if(document.frm.cmbcountry
  [document.frm.cmbcountry.selectedIndex].value==stateIDList[j])
    {
	StatesValue[m]=statelists[j];
	m++;
    }
 }
if(m==0)
 document.frm.cmbstate.options
 [m]=new Option('------- County/State N/A -------','');
else
 {
 for(k=0;k<StatesValue.length;k++)
  document.frm.cmbstate.options
  [k]=new Option(StatesValue[k],StatesValue[k]);
  document.frm.cmbstate.options[k]=new Option('                                                   ',' ');
 }
}

function BlankState()
{
if(document.frm.cmbstate.value==" ")
 document.frm.cmbstate.selectedIndex=0;
}
</Script>