$(document).ready(
	function()
	{
		
		$('select[name=main_category_id]').change( function()
			{
				var val = $(this).val();
				
				
				if( $(this).val() == '' )
				{
					var html = '<option value="">Wybierz podkategorie</option>';
					$('select[name=category_id]').empty().append(html);		
				}
				else
				{
					$('select[name=category_id]').empty().append('<option value="">Wczytywanie</option>');
					$.ajax({
						type: "post",
						url: "ajax/getAllSubcategories",
						data: "category=" + val,
						cache: true,
						success: function(html){
							html = '<option value="">Wybierz podkategorie</option>' + html;
							
							$('select[name=category_id]').hide().fadeIn().empty().append(html);		   
							
						}
					});
					//$('#sub_category').val( val );
					
				}
					
				

			}
		);
		

		
	}
)