//AJAX CALL FOR CATEGORY(FIRST DROPDOWN)
  $(document).ready(function(){
    $('#select2').on('change',function(){
        $('#loading1').css("display","block")
        var catgoryId = $(this).val();
        if(catgoryId){
            $.ajax({
                type:'POST',
                url:'ajax_load_subcategory.php',
                data:{catgoryId:catgoryId},
                success:function(html){
                  $('#select4').html(html);
                  $('#loading1').css("display","none")
                }
            });
        }else{
            $('#select4').html('<option value="">Select Category first</option>');
        }
    });
  });
  //CALL FOR SECOND DROPDOWN
  $(document).ready(function(){
    $('#select4').on('change',function(){
      var subcatgoryId = $(this).val();
      alert(subcatgoryId);
      //HOW CAN I FILL THIRD DROPDOWN VALUES
      // BASED UPON SECOND DROPDOWN VALUES
    });
  });