function add_select_handlers(){
	$("#parent_category").change(function(){
		change_parent_category($(this));
	});
}

function get_parent_categorie(object){
	//unbinding clicked
	object.unbind("click");
	
		$.get("ajax.php",{ 
			ajax_do:          'get_parent_categorie',
			select_id:               'parent_category',
			content_level:    1
			},
			function(answer){
				select = answer;
				object.after(select);
				//handler
				$("#parent_category").change(function(){
					change_parent_category($(this));
				});
			});
}

function change_parent_category(object){
	//empty slave category name on change
	$("#slave_category_name").removeAttr("value");
	
	if(object.val() == 0){
		if($("#slave_category").html() != null){
			$("#slave_category").remove();
			$("#submit_form").attr("disabled","true");
			$("#parent_category_name").removeAttr("value")
			return false;
		}
	}
	
		$.get("ajax.php",{ 
			ajax_do:        		 'get_slave_categorie',
			select_id:               'slave_category',
			parent_id:   		     $("#parent_category").val()
			},
			function(answer){
					//set patent category text value
					var parent_category_text = $("#parent_category option:selected").html();
					$("#parent_category_name").attr("value",parent_category_text);
					//empty slave category on change
					$("#slave_category").remove();
					select = answer;
					object.after(select);
					//insert handler
					$("#slave_category").change(function(){
						print_style();
					});
			});
	
}
function print_style(){
	if($("#slave_category option:selected").val() != 0){
		$("#submit_form").removeAttr("disabled");
		var slave_category_text = $("#slave_category option:selected").html();
		$("#slave_category_name").attr("value",slave_category_text);
	}else{
		$("#slave_category_name").removeAttr("value");
		$("#submit_form").attr("disabled","true");
	}
}