XCOM測試:電信網路技術中的一種測試。<?xml version -百科知識中文網

<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xml:lang="en"><head><meta name="author" content="Created with Hot Potatoes by Half-baked Software, registered to unregistered."></meta><meta name="keywords" content="Hot Potatoes, Hot Potatoes, Half-Baked Software, Windows, University of Victoria"></meta>

<title>
XCOM可以监听几个端口？
</title>

/* This is the CSS stylesheet used in the exercise. */
/* Elements in square brackets are replaced by data based on configuration settings when the exercise is built. */

/* BeginCorePageCSS */

/* Made with executable version 6.0 Release 4 Build 27 */

/* Hack to hide a nested QuickTime Player from IE, which can't handle it. */
* html object.MediaPlayerNotForIE {
display: none;
}

body{
font-family: Geneva,Arial,sans-serif;
background-color: #C0C0C0;
color: #000000;
margin-right: 5%;
margin-left: 5%;
font-size: small;
}

p{
text-align: left;
margin: 0px;
font-size: 100%;
}

table,div,span,td{
font-size: 100%;
color: #000000;
}

div.Titles{
padding: 0.5em;;
text-align: center;
color: #000000;
}

button{
font-family: Geneva,Arial,sans-serif;
font-size: 100%;
display: inline;
}

.ExerciseTitle{
font-size: 140%;
color: #000000;
}

.ExerciseSubtitle{
font-size: 120%;
color: #000000;
}

div.StdDiv{
background-color: #FFFFFF;
text-align: center;
font-size: 100%;
color: #000000;
padding: 0.5em;
border-style: solid;
border-width: 1px 1px 1px 1px;
border-color: #000000;
margin-bottom: 1px;
}

/* EndCorePageCSS */

.RTLText{
text-align: right;
font-size: 150%;
direction: rtl;
font-family: "Simplified Arabic", "Traditional Arabic", "Times New Roman", Geneva,Arial,sans-serif;
}

.CentredRTLText{
text-align: center;
font-size: 150%;
direction: rtl;
font-family: "Simplified Arabic", "Traditional Arabic", "Times New Roman", Geneva,Arial,sans-serif;
}

button p.RTLText{
text-align: center;
}

.RTLGapBox{
text-align: right;
font-size: 150%;
direction: rtl;
font-family: "Times New Roman", Geneva,Arial,sans-serif;
}

.Guess{
font-weight: bold;
}

.CorrectAnswer{
font-weight: bold;
}

div#Timer{
padding: 0.25em;
margin-left: auto;
margin-right: auto;
text-align: center;
color: #000000;
}

span#TimerText{
padding: 0.25em;
border-width: 1px;
border-style: solid;
font-weight: bold;
display: none;
color: #000000;
}

span.Instructions{

}

div.ExerciseText{

}

.FeedbackText, .FeedbackText span.CorrectAnswer, .FeedbackText span.Guess, .FeedbackText span.Answer{
color: #000000;
}

.LeftItem{
font-size: 100%;
color: #000000;
text-align: left;
}

.RightItem{
font-weight: bold;
font-size: 100%;
color: #000000;
}

span.CorrectMark{

}

input, textarea{
font-family: Geneva,Arial,sans-serif;
font-size: 120%;
}

select{
font-size: 100%;
}

div.Feedback {
background-color: #C0C0C0;
left: 33%;
width: 34%;
top: 33%;
z-index: 1;
border-style: solid;
border-width: 1px;
padding: 5px;
text-align: center;
color: #000000;
position: absolute;
display: none;
font-size: 100%;
}

div.ExerciseDiv{
color: #000000;
}

/* JMatch flashcard styles */
table.FlashcardTable{
background-color: transparent;
color: #000000;
border-color: #000000;
margin-left: 5%;
margin-right: 5%;
margin-top: 2em;
margin-bottom: 2em;
width: 90%;
position: relative;
text-align: center;
padding: 0px;
}

table.FlashcardTable tr{
border-style: none;
margin: 0px;
padding: 0px;
background-color: #FFFFFF;
}

table.FlashcardTable td.Showing{
font-size: 140%;
text-align: center;
width: 50%;
display: table-cell;
padding: 2em;
margin: 0px;
border-style: solid;
border-width: 1px;
color: #000000;
background-color: #FFFFFF;
}

table.FlashcardTable td.Hidden{
display: none;
}

/* JMix styles */
div#SegmentDiv{
margin-top: 2em;
margin-bottom: 2em;
text-align: center;
}

a.ExSegment{
font-size: 120%;
font-weight: bold;
text-decoration: none;
color: #000000;
}

span.RemainingWordList{
font-style: italic;
}

div.DropLine {
position: absolute;
text-align: center;
border-bottom-style: solid;
border-bottom-width: 1px;
border-bottom-color: #000000;
width: 80%;
}

/* JCloze styles */

.ClozeWordList{
text-align: center;
font-weight: bold;
}

div.ClozeBody{
text-align: left;
margin-top: 2em;
margin-bottom: 2em;
line-height: 2.0
}

span.GapSpan{
font-weight: bold;
}

/* JCross styles */

table.CrosswordGrid{
margin: auto auto 1em auto;
border-collapse: collapse;
padding: 0px;
background-color: #000000;
}

table.CrosswordGrid tbody tr td{
width: 1.5em;
height: 1.5em;
text-align: center;
vertical-align: middle;
font-size: 140%;
padding: 1px;
margin: 0px;
border-style: solid;
border-width: 1px;
border-color: #000000;
color: #000000;
}

table.CrosswordGrid span{
color: #000000;
}

table.CrosswordGrid td.BlankCell{
background-color: #000000;
color: #000000;
}

table.CrosswordGrid td.LetterOnlyCell{
text-align: center;
vertical-align: middle;
background-color: #ffffff;
color: #000000;
font-weight: bold;
}

table.CrosswordGrid td.NumLetterCell{
text-align: left;
vertical-align: top;
background-color: #ffffff;
color: #000000;
padding: 1px;
font-weight: bold;
}

.NumLetterCellText{
cursor: pointer;
color: #000000;
}

.GridNum{
vertical-align: super;
font-size: 66%;
font-weight: bold;
text-decoration: none;
color: #000000;
}

.GridNum:hover, .GridNum:visited{
color: #000000;
}

table#Clues{
margin: auto;
vertical-align: top;
}

table#Clues td{
vertical-align: top;
}

table.ClueList{
margin: auto;
}

td.ClueNum{
text-align: right;
font-weight: bold;
vertical-align: top;
}

td.Clue{
text-align: left;
}

div#ClueEntry{
text-align: left;
margin-bottom: 1em;
}

/* keypad styles */

div.Keypad{
text-align: center;
display: none; /* initially hidden, shown if needed */
margin-bottom: 0.5em;
}

div.Keypad button{
font-family: Geneva,Arial,sans-serif;
font-size: 120%;
background-color: #ffffff;
color: #000000;
width: 2em;
}

/* JQuiz styles */

div.QuestionNavigation{
text-align: center;
}

.QNum{
margin: 0EM 1em 0.5em 1em;
font-weight: bold;
vertical-align: middle;
}

textarea{
font-family: Geneva,Arial,sans-serif;
}

.QuestionText{
text-align: left;
margin: 0px;
font-size: 100%;
}

.Answer{
font-size: 120%;
letter-spacing: 0.1em;
}

.PartialAnswer{
font-size: 120%;
letter-spacing: 0.1em;
color: #000000;
}

.Highlight{
color: #000000;
background-color: #ffff00;
font-weight: bold;
font-size: 120%;
}

ol.QuizQuestions{
text-align: left;
list-style-type: none;
}

li.QuizQuestion{
padding: 1em;
border-style: solid;
border-width: 0px 0px 1px 0px;
}

ol.MCAnswers{
text-align: left;
list-style-type: upper-alpha;
padding: 1em;
}

ol.MCAnswers li{
margin-bottom: 1em;
}

ol.MSelAnswers{
text-align: left;
list-style-type: lower-alpha;
padding: 1em;
}

div.ShortAnswer{
padding: 1em;
}

.FuncButton {
text-align: center;
border-style: solid;

border-left-color: #ffffff;
border-top-color: #ffffff;
border-right-color: #7f7f7f;
border-bottom-color: #7f7f7f;
color: #000000;
background-color: #FFFFFF;

border-width: 2px;
padding: 3px 6px 3px 6px;
cursor: pointer;
}

.FuncButtonUp {
color: #FFFFFF;
text-align: center;
border-style: solid;

border-left-color: #ffffff;
border-top-color: #ffffff;
border-right-color: #7f7f7f;
border-bottom-color: #7f7f7f;

background-color: #000000;
color: #FFFFFF;
border-width: 2px;
padding: 3px 6px 3px 6px;
cursor: pointer;
}

.FuncButtonDown {
color: #FFFFFF;
text-align: center;
border-style: solid;

border-left-color: #7f7f7f;
border-top-color: #7f7f7f;
border-right-color: #ffffff;
border-bottom-color: #ffffff;
background-color: #000000;
color: #FFFFFF;

border-width: 2px;
padding: 3px 6px 3px 6px;
cursor: pointer;
}

/*BeginNavBarStyle*/

div.NavButtonBar{
background-color: #000000;
text-align: center;
margin: 2px 0px 2px 0px;
clear: both;
font-size: 100%;
}

.NavButton {
border-style: solid;
border-left-color: #7f7f7f;
border-top-color: #7f7f7f;
border-right-color: #000000;
border-bottom-color: #000000;
background-color: #000000;
color: #ffffff;

border-width: 2px;
cursor: pointer;
}

.NavButtonUp {
border-style: solid;

border-left-color: #7f7f7f;
border-top-color: #7f7f7f;
border-right-color: #000000;
border-bottom-color: #000000;
color: #000000;
background-color: #ffffff;

border-width: 2px;
cursor: pointer;
}

.NavButtonDown {
border-style: solid;

border-left-color: #000000;
border-top-color: #000000;
border-right-color: #7f7f7f;
border-bottom-color: #7f7f7f;
color: #000000;
background-color: #ffffff;

border-width: 2px;
cursor: pointer;
}

/*EndNavBarStyle*/

a{
color: #0000FF;
}

a:visited{
color: #0000CC;
}

a:hover{
color: #0000FF;
}

div.CardStyle {
position: absolute;
font-family: Geneva,Arial,sans-serif;
font-size: 100%;
padding: 5px;
border-style: solid;
border-width: 1px;
color: #000000;
background-color: #FFFFFF;
left: -50px;
top: -50px;
overflow: visible;
}

.rtl{
text-align: right;
font-size: 140%;
}

</style>

//<![CDATA[

<!--

function Client(){
//if not a DOM browser, hopeless
this.min = false; if (document.getElementById){this.min = true;};

this.ua = navigator.userAgent;
this.name = navigator.appName;
this.ver = navigator.appVersion;

//Get data about the browser
this.mac = (this.ver.indexOf('Mac') != -1);
this.win = (this.ver.indexOf('Windows') != -1);

//Look for Gecko
this.gecko = (this.ua.indexOf('Gecko') > 1);
if (this.gecko){
this.geckoVer = parseInt(this.ua.substring(this.ua.indexOf('Gecko')+6, this.ua.length));
if (this.geckoVer < 20020000){this.min = false;}
}
//Look for Firebird
this.firebird = (this.ua.indexOf('Firebird') > 1);
//Look for Safari
this.safari = (this.ua.indexOf('Safari') > 1);
if (this.safari){
this.gecko = false;
}
//Look for IE
this.ie = (this.ua.indexOf('MSIE') > 0);
if (this.ie){
this.ieVer = parseFloat(this.ua.substring(this.ua.indexOf('MSIE')+5, this.ua.length));
if (this.ieVer < 5.5){this.min = false;}
}
//Look for Opera
this.opera = (this.ua.indexOf('Opera') > 0);
if (this.opera){
this.operaVer = parseFloat(this.ua.substring(this.ua.indexOf('Opera')+6, this.ua.length));
if (this.operaVer < 7.04){this.min = false;}
}
if (this.min == false){
alert('Your browser may not be able to handle this page.');
}
//Special case for the horrible ie5mac
this.ie5mac = (this.ie&&this.mac&&(this.ieVer<6));
}

var C = new Client();

//for (prop in C){
//alert(prop + ': ' + C[prop]);
//}

//CODE FOR HANDLING NAV BUTTONS AND FUNCTION BUTTONS

//[strNavBarJS]
function NavBTNOver(Btn){
if (Btn.className != 'NavButtonDown'){Btn.className = 'NavButtonUp';}
}

function NavBtnOut(Btn){
Btn.className = 'NavButton';
}

function NavBtnDown(Btn){
Btn.className = 'NavButtonDown';
}
//[/strNavBarJS]

function FuncBtnOver(Btn){
if (Btn.className != 'FuncButtonDown'){Btn.className = 'FuncButtonUp';}
}

function FuncBtnOut(Btn){
Btn.className = 'FuncButton';
}

function FuncBtnDown(Btn){
Btn.className = 'FuncButtonDown';
}

function FocusAButton(){
if (document.getElementById('CheckButton1') != null){
document.getElementById('CheckButton1').focus();
}
else{
if (document.getElementById('CheckButton2') != null){
document.getElementById('CheckButton2').focus();
}
else{
document.getElementsByTagName('button')[0].focus();
}
}
}

//CODE FOR HANDLING DISPLAY OF popup FEEDBACK BOX

var topZ = 1000;

function ShowMessage(Feedback){
var Output = Feedback + '<br /><br />';
document.getElementById('FeedbackContent').innerHTML = Output;
var FDiv = document.getElementById('FeedbackDiv');
topZ++;
FDiv.style.zIndex = topZ;
FDiv.style.top = TopSettingWithScrollOffset(30) + 'px';

FDiv.style.display = 'block';

ShowElements(false, 'input');
ShowElements(false, 'select');
ShowElements(false, 'object');

//Focus the OK button
setTimeout("document.getElementById('FeedbackOKButton').focus()", 50);
//
}

//Added code to work around Quicktime bug for 6.0.4.24.
function ShowElements(Show, TagName){
//Special for IE bug -- hide all the form elements that will show through the popup
if ((C.ie)||(TagName == 'object')){
var Els = document.getElementsByTagName(TagName);
for (var i=0; i<Els.length; i++){
if (Show == true){
Els[i].style.visibility = 'visible';
}
else{
Els[i].style.visibility = 'hidden';
}
}
}
}

function HideFeedback(){
document.getElementById('FeedbackDiv').style.display = 'none';
ShowElements(true, 'input');
ShowElements(true, 'select');
ShowElements(true, 'object');
if (Finished == true){
Finish();
}
}

//GENERAL UTILITY FUNCTIONS AND VARIABLES

//PAGE DIMENSION FUNCTIONS
function PageDim(){
//Get the page width and height
this.W = 600;
this.H = 400;
this.W = document.getElementsByTagName('body')[0].clientWidth;
this.H = document.getElementsByTagName('body')[0].clientHeight;
}

var pg = null;

function GetPageXY(El) {
var XY = {x: 0, y: 0};
while(El){
XY.x += El.offsetLeft;
XY.y += El.offsetTop;
El = El.offsetParent;
}
return XY;
}

function GetViewportHeight(){
if (window.innerHeight){
return window.innerHeight;
}
else{
return document.getElementsByTagName('body')[0].clientHeight;
}
}

function TopSettingWithScrollOffset(TopPercent){
var T = Math.floor(GetViewportHeight() * (TopPercent/100));
return GetScrollTop() + T;
}

//CODE FOR AVOIDING LOSS OF DATA WHEN BACKSPACE KEY INVOKES history.back()
var InTextBox = false;

function SuppressBackspace(e){
if (InTextBox == true){return;}
if (C.ie) {
thisKey = window.event.keyCode;
}
else {
thisKey = e.keyCode;
}

var Suppress = false;

if (thisKey == 8) {
Suppress = true;
}

if (Suppress == true){
if (C.ie){
window.event.returnValue = false;
window.event.cancelBubble = true;
}
else{
e.preventDefault();
}
}
}

if (C.ie){
document.attachEvent('onkeydown',SuppressBackspace);
window.attachEvent('onkeydown',SuppressBackspace);
}
else{
if (window.addEventListener){
window.addEventListener('keypress',SuppressBackspace,false);
}
}

function ReduceItems(InArray, ReduceToSize){
var ItemToDump=0;
var j=0;
while (InArray.length > ReduceToSize){
ItemToDump = Math.floor(InArray.length*Math.random());
InArray.splice(ItemToDump, 1);
}
}

function Shuffle(InArray){
var Num;
var Temp = new Array();
var Len = InArray.length;

var j = Len;

for (var i=0; i<Len; i++){
Temp[i] = InArray[i];
}

for (i=0; i<Len; i++){
Num = Math.floor(j * Math.random());
InArray[i] = Temp[Num];

for (var k=Num; k < (j-1); k++) {
Temp[k] = Temp[k+1];
}
j--;
}
return InArray;
}

function WriteToInstructions(Feedback) {
document.getElementById('InstructionsDiv').innerHTML = Feedback;

}

function EscapeDoubleQuotes(InString){
return InString.replace(/"/g, '"')
}

function TrimString(InString){
var x = 0;

if (InString.length != 0) {
while ((InString.charAt(InString.length - 1) == '\u0020') || (InString.charAt(InString.length - 1) == '\u000A') || (InString.charAt(InString.length - 1) == '\u000D')){
InString = InString.substring(0, InString.length - 1)
}

while ((InString.charAt(0) == '\u0020') || (InString.charAt(0) == '\u000A') || (InString.charAt(0) == '\u000D')){
InString = InString.substring(1, InString.length)
}

while (InString.indexOf(' ') != -1) {
x = InString.indexOf(' ')
InString = InString.substring(0, x) + InString.substring(x+1, InString.length)
}

return InString;
}

else {
return '';
}
}

function FindLongest(InArray){
if (InArray.length < 1){return -1;}

var Longest = 0;
for (var i=1; i<InArray.length; i++){
if (InArray[i].length > InArray[Longest].length){
Longest = i;
}
}
return Longest;
}

//UNICODE CHARACTER FUNCTIONS
function IsCombiningDiacritic(CharNum){
var Result = (((CharNum >= 0x0300)&&(CharNum <= 0x370))||((CharNum >= 0x20d0)&&(CharNum <= 0x20ff)));
Result = Result || (((CharNum >= 0x3099)&&(CharNum <= 0x309a))||((CharNum >= 0xfe20)&&(CharNum <= 0xfe23)));
return Result;
}

function IsCJK(CharNum){
return ((CharNum >= 0x3000)&&(CharNum < 0xd800));
}

//SETUP FUNCTIONS
//BROWSER WILL REFILL TEXT BOXES FROM CACHE IF NOT PREVENTED
function ClearTextBoxes(){
var NList = document.getElementsByTagName('input');
for (var i=0; i<NList.length; i++){
if ((NList[i].id.indexOf('Guess') > -1)||(NList[i].id.indexOf('Gap') > -1)){
NList[i].value = '';
}
if (NList[i].id.indexOf('CHK') > -1){
NList[i].checked = '';
}
}
}

//EXTENSION TO ARRAY OBJECT
function Array_IndexOf(Input){
var Result = -1;
for (var i=0; i<this.length; i++){
if (this[i] == Input){
Result = i;
}
}
return Result;
}
Array.prototype.indexOf = Array_IndexOf;

//IE HAS RENDERING BUG WITH BOTTOM NAVBAR
function RemoveBottomNavBarForIE(){
if ((C.ie)&&(document.getElementById('Reading') != null)){
if (document.getElementById('BottomNavBar') != null){
document.getElementById('TheBody').removeChild(document.getElementById('BottomNavBar'));
}
}
}

//HOTPOTNET-RELATED CODE

var HPNStartTime = (new Date()).getTime();
var SubmissionTimeout = 30000;
var Detail = ''; //Global that is used to submit tracking data

function Finish(){
//If there's a form, fill it out and submit it
if (document.store != null){
Frm = document.store;
Frm.starttime.value = HPNStartTime;
Frm.endtime.value = (new Date()).getTime();
Frm.mark.value = Score;
Frm.detail.value = Detail;
Frm.submit();
}
}

//JQUIZ CORE JAVASCRIPT CODE

var CurrQNum = 0;
var CorrectIndicator = ':-)';
var IncorrectIndicator = 'X';
var YourScoreIs = 'Your score is ';
var ContinuousScoring = true;
var CorrectFirstTime = 'Questions answered correctly first time: ';
var ShowCorrectFirstTime = true;
var ShuffleQs = false;
var ShuffleAs = false;
var DefaultRight = 'Correct!';
var DefaultWrong = 'Sorry! TRY AGAIN.';
var QsToShow = 3;
var Score = 0;
var Finished = false;
var Qs = null;
var QArray = new Array();
var ShowingAllQuestions = false;
var ShowAllQuestionsCaption = 'Show all questions';
var ShowOneByOneCaption = 'Show questions one by one';
var State = new Array();
var Feedback = '';
var TimeOver = false;
var strInstructions = '';

//The following variable can be used to add a message explaining that
//the question is finished, so no further marking will take place.
var strQuestionFinished = '';

function CompleteEmptyFeedback(){
var QNum, Anum;
for (QNum=0; QNum<I.length; QNum++){
//Only do this if not multi-select
if (I[QNum][2] != '3'){
for (ANum = 0; ANum<I[QNum][3].length; ANum++){
if (I[QNum][3][ANum][1].length < 1){
if (I[QNum][3][ANum][2] > 0){
I[QNum][3][ANum][1] = DefaultRight;
}
else{
I[QNum][3][ANum][1] = DefaultWrong;
}
}
}
}
}
}

//Show the first item
QArray[0].style.display = '';
//Now hide all except the first item
for (i=1; i<QArray.length; i++){
QArray[i].style.display = 'none';
}
SetQNumreadout();
SetFocusToTextbox();
}

var I=new Array();
I[0]=new Array();I[0][0]=100;
I[0][1]="";
I[0][2]="0";
I[0][3]=new Array();
I[0][3][0]=new Array('1\u4E2A','',0,0,1);
I[0][3][1]=new Array('2\u4E2A','',0,0,1);
I[0][3][2]=new Array('3\u4E2A','',0,0,1);
I[0][3][3]=new Array('n\u4E2A\uFF081<= n <= 65536\uFF09','',1,100,1);
I[1]=new Array();I[1][0]=100;
I[1][1]="";
I[1][2]="0";
I[1][3]=new Array();
I[1][3][0]=new Array('\u901A\u4FE1\u4E2D\u95F4\u4EF6','Correct!',1,100,1);
I[1][3][1]=new Array('\u5E94\u7528\u7A0B\u5E8F','Sorry! Try again.',0,0,1);
I[1][3][2]=new Array('\u6570\u636E\u5E93\u7A0B\u5E8F','Sorry! Try again.',0,0,1);
I[1][3][3]=new Array('\u6D88\u606F\u4E2D\u95F4\u4EF6','Correct!',1,100,1);
I[2]=new Array();I[2][0]=100;
I[2][1]="";
I[2][2]="3";
I[2][3]=new Array();
I[2][3][0]=new Array('\u901A\u4FE1\u4E2D\u95F4\u4EF6','',1,100,1);
I[2][3][1]=new Array('\u6570\u636E\u5E93\u670D\u52A1\u5668','',0,0,1);
I[2][3][2]=new Array('\u6D88\u606F\u4E2D\u95F4\u4EF6','',1,100,1);
I[2][3][3]=new Array('\u5E94\u7528\u7A0B\u5E8F','',0,0,1);

function StartUp(){
RemoveBottomNavBarForIE();

//If there's only one question, no need for question navigation controls
if (QsToShow < 2){
document.getElementById('QNav').style.display = 'none';
}
//Stash the instructions so they can be redisplayed
strInstructions = document.getElementById('InstructionsDiv').innerHTML;

CompleteEmptyFeedback();

SetUpQuestions();
ClearTextBoxes();
CreateStatusArray();

//Check search string for q parameter
if (document.location.search.length > 0){
if (ShuffleQs == false){
var JumpTo = parseInt(document.location.search.substring(1,document.location.search.length))-1;
if (JumpTo <= QsToShow){
ChangeQ(JumpTo);
}
}
}
//Undocumented function added 10/12/2004
ShowSpecialReadingForQuestion();
}

function ShowHideQuestions(){
FuncBtnOut(document.getElementById('ShowMethodButton'));
document.getElementById('ShowMethodButton').style.display = 'none';
if (ShowingAllQuestions == false){
for (var i=0; i<QArray.length; i++){
QArray[i].style.display = '';
}
document.getElementById('Questions').style.listStyleType = 'decimal';
document.getElementById('OneByOneReadout').style.display = 'none';
document.getElementById('ShowMethodButton').innerHTML = ShowOneByOneCaption;
ShowingAllQuestions = true;
}
else{
for (var i=0; i<QArray.length; i++){
if (i != CurrQNum){
QArray[i].style.display = 'none';
}
}
document.getElementById('Questions').style.listStyleType = 'none';
document.getElementById('OneByOneReadout').style.display = '';
document.getElementById('ShowMethodButton').innerHTML = ShowAllQuestionsCaption;
ShowingAllQuestions = false;
}
document.getElementById('ShowMethodButton').style.display = 'inline';
}

function CreateStatusArray(){
var QNum, ANum;
//For each item in the item array
for (QNum=0; QNum<I.length; QNum++){
//Check if the question still exists (hasn't been nuked by showing a random selection)
if (document.getElementById('Q_' + QNum) != null){
State[QNum] = new Array();
State[QNum][0] = -1; //Score for this q; -1 shows question not done yet
State[QNum][1] = new Array(); //answers
for (ANum = 0; ANum<I[QNum][3].length; ANum++){
State[QNum][1][ANum] = 0; //answer not chosen yet; when chosen, will store its position in the series of choices
}
State[QNum][2] = 0; //tries at this q so far
State[QNum][3] = 0; //incrementing percent-correct values of selected answers
State[QNum][4] = 0; //Penalties incurred for hints
State[QNum][5] = ''; //Sequence of answers chosen by number
}
else{
State[QNum] = null;
}
}
}

function CheckMCAnswer(QNum, ANum, Btn){
//if question doesn't exist, bail
if (State[QNum].length < 1){return;}
//Get the feedback
Feedback = I[QNum][3][ANum][1];
//Now show feedback and bail if question already complete
if (State[QNum][0] > -1){
//Add an extra message explaining that the question
// is finished if defined by the user
if (strQuestionFinished.length > 0){Feedback += '<br />' + strQuestionFinished;}
//Show the feedback
ShowMessage(Feedback);
return;
}
//Hide the button while processing
Btn.style.display = 'none';

//Increment the number of tries
State[QNum][2]++;
//Add the percent-correct value of this answer
State[QNum][3] += I[QNum][3][ANum][3];
//Store the try number in the answer part of the State array, for tracking purposes
State[QNum][1][ANum] = State[QNum][2];
State[QNum][5] += String.fromCharCode(65+ANum) + ',';
//Should this answer be accepted as correct?
if (I[QNum][3][ANum][2] < 1){
//It's wrong

//Mark the answer
Btn.innerHTML = IncorrectIndicator;
//Remove any previous score unless exercise is finished (6.0.3.8+)
if (Finished == false){
WriteToInstructions(strInstructions);
}
//Check whether this leaves just one MC answer unselected, in which case the Q is terminated
var RemainingAnswer = FinalAnswer(QNum);
if (RemainingAnswer > -1){
//Behave as if the last answer had been selected, but give no credit for it
//Increment the number of tries
State[QNum][2]++;
//Calculate the score for this question
CalculateMCQuestionScore(QNum);

//Get the overall score and add it to the feedback
CalculateOverallScore();
if ((ContinuousScoring == true)||(Finished == true)){
Feedback += '<br />' + YourScoreIs + ' ' + Score + '%.';
WriteToInstructions(YourScoreIs + ' ' + Score + '%.');
}
}
}
else{
//It's right
//Mark the answer
Btn.innerHTML = CorrectIndicator;
//Calculate the score for this question
CalculateMCQuestionScore(QNum);

//Get the overall score and add it to the feedback
if (ContinuousScoring == true){
CalculateOverallScore();
if ((ContinuousScoring == true)||(Finished == true)){
Feedback += '<br />' + YourScoreIs + ' ' + Score + '%.';
WriteToInstructions(YourScoreIs + ' ' + Score + '%.');
}
}
}
//Show the button again
Btn.style.display = 'inline';
//Finally, show the feedback
ShowMessage(Feedback);
//Check whether all questions are now done
CheckFinished();
}

function CalculateMCQuestionScore(QNum){
var Tries = State[QNum][2] + State[QNum][4]; //include tries and hint penalties
var PercentCorrect = State[QNum][3];
var TotAns = GetTotalMCAnswers(QNum);
var HintPenalties = State[QNum][4];
//Make sure it's not already complete

if (State[QNum][0] < 0){
//Allow for Hybrids
if (HintPenalties >= 1){
State[QNum][0] = 0;
}
else{
//This line calculates the score for this question
if (TotAns == 1){
State[QNum][0] = 1;
}
else{
State[QNum][0] = ((TotAns-((Tries*100)/State[QNum][3]))/(TotAns-1));
}
}
//Fix for Safari bug added for version 6.0.3.42 (negative infinity problem)
if ((State[QNum][0] < 0)||(State[QNum][0] == Number.NEGATIVE_INFINITY)){
State[QNum][0] = 0;
}
}
}

function GetTotalMCAnswers(QNum){
var Result = 0;
for (var ANum=0; ANum<I[QNum][3].length; ANum++){
if (I[QNum][3][ANum][4] == 1){ //This is an MC answer
Result++;
}
}
return Result;
}

function CheckMultiSelAnswer(QNum){
//bail if question doesn't exist or exercise finished
if ((State[QNum].length < 1)||(Finished == true)){return;}

//Increment the tries for this question
State[QNum][2]++;
var ShouldBeChecked;
var Matches = 0;
State[QNum][5] += '|';
//Check if there are any mismatches
Feedback = '';
var CheckBox = null;
for (var ANum=0; ANum<I[QNum][3].length; ANum++){
CheckBox = document.getElementById('Q_' + QNum + '_' + ANum + '_Chk');
if (CheckBox.checked == true){
State[QNum][5] += 'Y';
}
else{
State[QNum][5] += 'N';
}
ShouldBeChecked = (I[QNum][3][ANum][2] == 1);
if (ShouldBeChecked == CheckBox.checked){
Matches++;
}
else{
Feedback = I[QNum][3][ANum][1];
}
}
//Add the hit readout
Feedback = Matches + ' / ' + I[QNum][3].length + '<br />' + Feedback;
if (Matches == I[QNum][3].length){
//It's right
CalculateMultiSelQuestionScore(QNum);
if (ContinuousScoring == true){
CalculateOverallScore();
if ((ContinuousScoring == true)||(Finished == true)){
Feedback += '<br />' + YourScoreIs + ' ' + Score + '%.';
WriteToInstructions(YourScoreIs + ' ' + Score + '%.');
}
}
}
else{
//It's wrong -- Remove any previous score unless exercise is finished (6.0.3.8+)
if (Finished == false){
WriteToInstructions(strInstructions);
}
}
//Show the feedback
ShowMessage(Feedback);
//Check whether all questions are now done
CheckFinished();
}

function CalculateOverallScore(){
var TotalWeighting = 0;
var TotalScore = 0;
for (var QNum=0; QNum<State.length; QNum++){
if (State[QNum] != null){
if (State[QNum][0] > -1){
TotalWeighting += I[QNum][0];
TotalScore += (I[QNum][0] * State[QNum][0]);
}
}
}
if (TotalWeighting > 0){
Score = Math.floor((TotalScore/TotalWeighting)*100);
}
else{
//if TotalWeighting is 0, no questions so far have any value, so
//no penalty should be shown.
Score = 100;
}
}

TimeOver = true;
Locked = true;

Finished = true;
Detail = '<?xml version="1.0"?><hpnetresult><fields>';
for (QNum=0; QNum<State.length; QNum++){
if (State[QNum] != null){
if (State[QNum][5].length > 0){
Detail += '<field><fieldname>Question #' + (QNum+1) + '</fieldname><fieldtype>question-tracking</fieldtype><fieldlabel>Q ' + (QNum+1) + '</fieldlabel><fieldlabelid>QuestionTrackingField</fieldlabelid><fielddata>' + State[QNum][5] + '</fielddata></field>';
}
}
}
Detail += '</fields></hpnetresult>';
setTimeout('Finish()', SubmissionTimeout);
}
}

//-->

//]]>

</script>

</head>

<button class="NavButton" onfocus="NavBtnOver(this)" onblur="NavBtnOut(this)" onmouseover="NavBtnOver(this)" onmouseout="NavBtnOut(this)" onmousedown="NavBtnDown(this)" onmouseup="NavBtnOut(this)" onclick="location="contents.htm"; return false;"> Index </button>

</div>

<div class="Titles">
<h2 class="ExerciseTitle">XCOM可以监听几个端口？</h2>

</div>

<p style="text-align: right;">
<button id="ShowMethodButton" class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOver(this)" onclick="ShowHideQuestions(); return false;">Show all questions</button>
</p>

</div>
<ol class="QuizQuestions" id="Questions">
<li class="QuizQuestion" id="Q_0" style="display: none;"><div class="QuestionText"></div><ol class="MCAnswers"><li id="Q_0_0"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_0_0_Btn" onclick="CheckMCAnswer(0,0,this)">?</button>1个</li><li id="Q_0_1"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_0_1_Btn" onclick="CheckMCAnswer(0,1,this)">?</button>2个</li><li id="Q_0_2"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_0_2_Btn" onclick="CheckMCAnswer(0,2,this)">?</button>3个</li><li id="Q_0_3"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_0_3_Btn" onclick="CheckMCAnswer(0,3,this)">?</button>n个（1<= n <= 65536）</li></ol></li>
<li class="QuizQuestion" id="Q_1" style="display: none;"><div class="QuestionText"></div><ol class="MCAnswers"><li id="Q_1_0"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_1_0_Btn" onclick="CheckMCAnswer(1,0,this)">?</button>通信中间件</li><li id="Q_1_1"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_1_1_Btn" onclick="CheckMCAnswer(1,1,this)">?</button>应用程序</li><li id="Q_1_2"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_1_2_Btn" onclick="CheckMCAnswer(1,2,this)">?</button>数据库程序</li><li id="Q_1_3"><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" id="Q_1_3_Btn" onclick="CheckMCAnswer(1,3,this)">?</button>消息中间件</li></ol></li>
<li class="QuizQuestion" id="Q_2" style="display: none;"><div class="QuestionText"></div><ol class="MSelAnswers"><li id="Q_2_0"><form method="post" action="" onsubmit="return false;"><div><input type="checkbox" id="Q_2_0_Chk" class="MSelCheckbox" />通信中间件</div></form></li><li id="Q_2_1"><form method="post" action="" onsubmit="return false;"><div><input type="checkbox" id="Q_2_1_Chk" class="MSelCheckbox" />数据库服务器</div></form></li><li id="Q_2_2"><form method="post" action="" onsubmit="return false;"><div><input type="checkbox" id="Q_2_2_Chk" class="MSelCheckbox" />消息中间件</div></form></li><li id="Q_2_3"><form method="post" action="" onsubmit="return false;"><div><input type="checkbox" id="Q_2_3_Chk" class="MSelCheckbox" />应用程序</div></form></li></ol><button class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" onclick="CheckMultiSelAnswer(2)">Check</button></li></ol>

</div>

</div>

</body>

</html>

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