function onChangeCategoryOne() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");

	three.hide();
	three.selectedIndex = 0;
	four.hide();
	four.selectedIndex = 0;
	five.hide();
	five.selectedIndex = 0;
	six.hide();
	six.selectedIndex = 0;
	seven.hide();
	seven.selectedIndex = 0;
	eight.hide();
	eight.selectedIndex = 0;

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (oneID == 0) {
		two.hide(); 
		two.selectedIndex = 0;
	}else{
		$("#categoryTwoSelectSpan").load("/CategoryTwoOperateServlet", 
				{operation:14, oneID:oneID});
		two.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID});

	if (typeof(onChangeCategoryOneForOthers) == "function")
		onChangeCategoryOneForOthers(oneID);
}
	
function onChangeCategoryTwo() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");
	
	four.hide();
	four.selectedIndex = 0;
	five.hide();
	five.selectedIndex = 0;
	six.hide();
	six.selectedIndex = 0;
	seven.hide();
	seven.selectedIndex = 0;
	eight.hide();
	eight.selectedIndex = 0;

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (twoID == 0) {
		three.hide(); 
		three.selectedIndex = 0;
	}else{
		$("#categoryThreeSelectSpan").load("/CategoryThreeOperateServlet", 
				{operation:14, oneID:oneID, twoID:twoID});
		three.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID});

	if ((typeof onChangeCategoryTwoForOthers) == 'function'){
		onChangeCategoryTwoForOthers(oneID, twoID);
	}
}

function onChangeCategoryThree() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");
	
	five.hide();
	five.selectedIndex = 0;
	six.hide();
	six.selectedIndex = 0;
	seven.hide();
	seven.selectedIndex = 0;
	eight.hide();
	eight.selectedIndex = 0;

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (threeID == 0) {
		four.hide(); 
		four.selectedIndex = 0;
	}else{
		$("#categoryFourSelectSpan").load("/CategoryFourOperateServlet", 
				{operation:14, oneID:oneID, twoID:twoID, threeID:threeID});
		four.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID, threeID:threeID});

	if (typeof(onChangeCategoryThreeForOthers) == "function")
		onChangeCategoryThreeForOthers(oneID, twoID, threeID);
}

function onChangeCategoryFour() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");
	
	six.hide();
	six.selectedIndex = 0;
	seven.hide();
	seven.selectedIndex = 0;
	eight.hide();
	eight.selectedIndex = 0;

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (fourID == 0) {
		five.hide(); 
		five.selectedIndex = 0;
	}else{
		$("#categoryFiveSelectSpan").load("/CategoryFiveOperateServlet", 
				{operation:14, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID});
		five.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID});

	if (typeof(onChangeCategoryFourForOthers) == "function")
		onChangeCategoryFourForOthers(oneID, twoID, threeID, fourID);
}

function onChangeCategoryFive() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");
	
	seven.hide();
	seven.selectedIndex = 0;
	eight.hide();
	eight.selectedIndex = 0;

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (fiveID == 0) {
		six.hide(); 
		six.selectedIndex = 0;
	}else{
		$("#categorySixSelectSpan").load("/CategorySixOperateServlet", 
				{operation:14, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID});
		six.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID});

	if (typeof(onChangeCategoryFiveForOthers) == "function")
		onChangeCategoryFiveForOthers(oneID, twoID, threeID, fourID, fiveID);
}

function onChangeCategorySix() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");
	
	eight.hide();
	eight.selectedIndex = 0;

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (sixID == 0) {
		seven.hide(); 
		seven.selectedIndex = 0;
	}else{
		$("#categorySevenSelectSpan").load("/CategorySevenOperateServlet", 
				{operation:14, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID, sixID:sixID});
		seven.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID, sixID:sixID});

	if (typeof(onChangeCategorySixForOthers) == "function")
		onChangeCategorySixForOthers(oneID, twoID, threeID, fourID, fiveID, sixID);
}

function onChangeCategorySeven() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");
	
	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	if (sevenID == 0) {
		eight.hide(); 
		eight.selectedIndex = 0;
	}else{
		$("#categoryEightSelectSpan").load("/CategoryEightOperateServlet", 
				{operation:14, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID, sixID:sixID, sevenID:sevenID});
		eight.show();
	}

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID, sixID:sixID, sevenID:sevenID});

	if (typeof(onChangeCategorySevenForOthers) == "function")
		onChangeCategorySevenForOthers(oneID, twoID, threeID, fourID, fiveID, sixID, sevenID);
}

function onChangeCategoryEight() {
	one = $("#categoryOneSelect");
	two = $("#categoryTwoSelect");
	three = $("#categoryThreeSelect");
	four = $("#categoryFourSelect");
	five = $("#categoryFiveSelect");
	six = $("#categorySixSelect");
	seven = $("#categorySevenSelect");
	eight = $("#categoryEightSelect");

	var oneID = one.val();
	var twoID = two.val();
	var threeID = three.val();
	var fourID = four.val();
	var fiveID = five.val();
	var sixID = six.val();
	var sevenID = seven.val();
	var eightID = eight.val();

	$.post("/CategoryOperateServlet", 
			{Action: "post", operation:201, oneID:oneID, twoID:twoID, threeID:threeID, fourID:fourID, fiveID:fiveID, sixID:sixID, sevenID:sevenID, eight:eight});

	if (typeof(onChangeCategoryEightForOthers) == "function")
		onChangeCategoryEightForOthers(oneID, twoID, threeID, fourID, fiveID, sixID, sevenID, eightID);
}