jquiz6.js_

很棒的在线教学系统

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];
	if (State[QNum][5].length > 0){State[QNum][5] += ' | ';}
	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 FinalAnswer(QNum){
	var UnchosenAnswers = 0;
	var FinalAnswer = -1;
	for (var ANum=0; ANum<I[QNum][3].length; ANum++){
		if (I[QNum][3][ANum][4] == 1){ //This is an MC answer
			if (State[QNum][1][ANum] < 1){ //This answer hasn't been chosen yet
				UnchosenAnswers++;
				FinalAnswer = ANum;
			}
		}
	}
	if (UnchosenAnswers == 1){
		return FinalAnswer;
	}
	else{
		return -1;
	}
}

[/inclMultiChoice]

[inclMultiSelect]

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;
	if (State[QNum][5].length > 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 CalculateMultiSelQuestionScore(QNum){
	var Tries = State[QNum][2];
	var TotAns = State[QNum][1].length;

//Make sure it's not already complete
	if (State[QNum][0] < 0){
		State[QNum][0] = (TotAns - (Tries-1)) / TotAns;
		if (State[QNum][0] < 0){
			State[QNum][0] = 0;
		}
	}
}

[/inclMultiSelect]

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;
	}
}

function CheckFinished(){
	var FB = '';
	var AllDone = true;
	for (var QNum=0; QNum<State.length; QNum++){
		if (State[QNum] != null){
			if (State[QNum][0] < 0){
				AllDone = false;
			}
		}
	}
	if (AllDone == true){

//Report final score and submit if necessary
		CalculateOverallScore();
		FB = YourScoreIs + ' ' + Score + '%.';
		if (ShowCorrectFirstTime == true){
			var CFT = 0;
			for (QNum=0; QNum<State.length; QNum++){
				if (State[QNum] != null){
					if (State[QNum][0] >= 1){
						CFT++;
					}
				}
			}
			FB += '<br />' + CorrectFirstTime + ' ' + CFT + '/' + QsToShow;
		}
		WriteToInstructions(FB);

		Finished == true;
[inclTimer]
		window.clearInterval(Interval);
[/inclTimer]

[inclScorm1.2]
		if (TimeOver == true){
			SetScormTimedOut();
		}
		else{
			SetScormComplete();
		}
[/inclScorm1.2]

		TimeOver = true;
		Locked = true;

[inclSendResults]
		setTimeout('SendResults(' + Score + ')', 50);
[/inclSendResults]

		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);
	}
[inclScorm1.2]
	else{
		SetScormIncomplete();
	}
[/inclScorm1.2]
}

[inclTimer]
function TimesUp(){
	document.getElementById('Timer').innerHTML = '[strTimesUp]';
[inclPreloadImages]
	RefreshImages();
[/inclPreloadImages]
	TimeOver = true;
	Finished = true;
	ShowMessage('[strTimesUp]');

//Set all remaining scores to 0
	for (var QNum=0; QNum<State.length; QNum++){
		if (State[QNum] != null){
			if (State[QNum][0] < 0){
				State[QNum][0] = 0;
			}
		}
	}
	CheckFinished();
}
[/inclTimer]