var useranswers = new Array();

var answered = 0;



function renderQuiz()

{

	for(i=0;i<questions.length;i++)

	{

		document.writeln('<p class="question">' + questions[i] + ' <span id="result_' + i + '"><img src="blank.gif" style="border:0" alt="" /></span></p>');

		for(j=0;j<choices[i].length;j++)

		{

			document.writeln('<input type="radio" name="answer_' + i + '" value="' + choices[i][j] + '" id="answer_' + i + '_' + j + '" class="question_' + i + '" onclick="submitAnswer(' + i + ', this, \'question_' + i + '\', \'label_' + i + '_' + j + '\')" /><label id="label_' + i + '_' + j + '" for="answer_' + i + '_' + j + '"> ' + choices[i][j] + '</label><br />');

		}

	}

	document.writeln('<p><input type="submit" value="Show Score" onclick="showScore()" /> <input type="submit" value="Reset Quiz" onclick="resetQuiz(true)" /></p><p style="display:none"><img src="correct.gif" style="border:0" alt="Correct!" /><img src="incorrect.gif" style="border:0" alt="Incorrect!" /></p>');

}

function resetQuiz(showConfirm)

{

	if(showConfirm)

		if(!confirm("Are you sure you want to reset your answers and start from the beginning?"))

			return false;

			

	document.location = document.location;

}

function submitAnswer(questionId, obj, classId, labelId)

{

	useranswers[questionId] = obj.value;

	document.getElementById(labelId).style.fontWeight = "bold";

	disableQuestion(classId);

	showResult(questionId);

	answered++;

}

function showResult(questionId)

{

	if(answers[questionId] == useranswers[questionId])

	{

		document.getElementById('result_' + questionId).innerHTML = '<img src="correct.gif" style="border:0" alt="Correct!" />';

	}

	else

	{

		document.getElementById('result_' + questionId).innerHTML = '<img src="incorrect.gif" style="border:0" alt="Incorrect!" />';

	}

}

function showScore()

{

	if(answered != answers.length)

	{

		alert("You have not answered all of the questions yet!");

		return false;

	}

	questionCount = answers.length;

	correct = 0;

	incorrect = 0;

	for(i=0;i<questionCount;i++)

	{

		if(useranswers[i] == answers[i])

			correct++;

		else

			incorrect++;

	}

	pc = Math.round((correct / questionCount) * 100);

	alertMsg = "You scored " + correct + " out of " + questionCount + "\n\n";

	alertMsg += "You correctly answered " + pc + "% of the questions! \n\n";

	if(pc == 100)

		alertMsg += response[0];

	else if(pc >= 90)

		alertMsg += response[1];

	else if(pc >= 70)

		alertMsg += response[2];

	else if(pc > 50)

		alertMsg += response[3];

	else if(pc >= 40)

		alertMsg += response[4];

	else if(pc >= 20)

		alertMsg += response[5];

	else if(pc >= 10)

		alertMsg += response[6];

	else

		alertMsg += response[7];

		

	if(pc < 100)

	{

		if(confirm(alertMsg))

			resetQuiz(false);

		else

			return false;

	}

	else

	{

		alert(alertMsg);

	}

}

function disableQuestion(classId)

{

	var alltags=document.all? document.all : document.getElementsByTagName("*")

	for (i=0; i<alltags.length; i++)

	{

		if (alltags[i].className == classId)

		{

			alltags[i].disabled = true;

		}

	}

}