Untitled

<?php
      $hostname="localhost";
      $username="root";
      $password="";
      $databasename="validate1";
      $connect=mysqli_connect($hostname,$username,$password,$databasename);
      $txt_country="0";
      $txt_state="0";
      $txt_city="0";
    if(isset($_POST['txt_country']))
       {
        $txt_country=$_POST["txt_country"];
        $txt_state=$_POST['txt_state'];
        $txt_city=$_POST['txt_city'];
      }
    ?>

    <html>
    <head>
       <script type="text/javascript">
        function showState(txt_country)
         {
            document.frm.submit();
          }
        function showCity(txt_state)
       {
          document.frm.submit();
        }
     enter code here</script>