//
// QueryString
//

function QueryString(key)
{
	var value = null;
	for (var i=0;i<QueryString.keys.length;i++)
	{
		if (QueryString.keys[i]==key)
		{
			value = QueryString.values[i];
			break;
		}
	}
	return value;
}
QueryString.keys = new Array();
QueryString.values = new Array();

function QueryString_Parse()
{
	var query = window.location.search.substring(1);
	var pairs = query.split("&");
	
	for (var i=0;i<pairs.length;i++)
	{
		var pos = pairs[i].indexOf('=');
		if (pos >= 0)
		{
			var argname = pairs[i].substring(0,pos);
			var value = pairs[i].substring(pos+1);
			QueryString.keys[QueryString.keys.length] = argname;
			QueryString.values[QueryString.values.length] = value;		
		}
	}

}

QueryString_Parse();


//
// Answer
//
function Answer_WriteHTML()
{
	document.write('<INPUT type="radio" value="' + this.id + '" name="answers"> ');
	document.write('<span  class="quizText">' + this.text + '</span><br>');
}

function Answer(aID)
{
	this.text = "New Answer";
	this.id = aID;
	this.correct = false;
	
	this.WriteHTML = Answer_WriteHTML;
}

//
// AnswerList
//

function AnswerList_NewAnswer()
{
	var a = new Answer(this.sequenceID);
	this.sequenceID++;
	this.aList[this.aList.length] = a;

	// Optional Args: text, correct
	if (arguments.length > 0)
		a.text = arguments[0];

	if (arguments.length > 1)
		a.correct = arguments[1];

	if (this.editor)
		this.editor.AnswerSectionUpdate();
		
	return a;
}

function AnswerList_Remove(id)
{
	for (var i=0;i<this.aList.length;i++)
	{
		if (this.aList[i] && this.aList[i].id == id)
		{
			this.aList[i] = null;
			break;
		}
	}
}

function AnswerList_Find(id)
{
	var result = null;
	for (var i=0;i<this.aList.length;i++)
	{
		if (this.aList[i] && this.aList[i].id == id)
		{
			result = this.aList[i];
			break;
		}
	}
	return result;
}

function AnswerList_WriteHTML()
{
	for (var i=0;i<this.aList.length;i++)
		this.aList[i].WriteHTML();
}

function AnswerList(editor)
{
	this.editor = editor;
	this.sequenceID = 0;
	this.aList = new Array();
	
	this.NewAnswer = AnswerList_NewAnswer;
	this.Remove = AnswerList_Remove;
	this.Find = AnswerList_Find;
	this.WriteHTML = AnswerList_WriteHTML;
}

//
// Question
//

function Question_NewAnswer(text,correct)
{
	this.answerList.NewAnswer(text,correct);
}

function Question_WriteHTML()
{
	document.write('<p class="quizQuestion">Q: ' + this.text + '</p>');
	this.answerList.WriteHTML();
}

function Question_GetCorrectAnswer(text,correct)
{
	var result = "";
	for (var i=0;i<this.answerList.aList.length;i++)
	{
		if (this.answerList.aList[i] && this.answerList.aList[i].correct)
		{
			result = this.answerList.aList[i].text;
			break;
		}
	}
	return result;
}

function Question(qID,editor)
{
	this.text = "New Question";
	this.id = qID;
	this.editor = editor;
		
	this.answerList = new AnswerList(editor);
	
	this.NewAnswer = Question_NewAnswer;
	this.WriteHTML = Question_WriteHTML;
	this.GetCorrectAnswer = Question_GetCorrectAnswer;
}

//
// QuestionList
//

function QuestionList_NewQuestion()
{
	var q = new Question(this.sequenceID,this.editor);
	this.sequenceID++;
	this.qList[this.qList.length] = q;
	
	// Optional Args: text
	if (arguments.length > 0)
		q.text = arguments[0];
	
	if (this.editor)
		this.editor.QuestionItemsAdd(q);
		
	return q;
}

function QuestionList_Remove(id)
{
	for (var i=0;i<this.qList.length;i++)
	{
		if (this.qList[i] && this.qList[i].id == id)
		{
			this.qList[i] = null;
			break;
		}
	}
}

function QuestionList_Find(id)
{
	var result = null;
	for (var i=0;i<this.qList.length;i++)
	{
		if (this.qList[i] && (this.qList[i].id == id))
		{
			result = this.qList[i];
			break;
		}
	}
	return result;
}

function QuestionList_WriteHTML()
{
	var index = 0;
	
	var lastQuestion = QueryString("lastQuestion");
	var ccount = QueryString("ccount");

	if (ccount == null)
		ccount = 0;
	else
		ccount = parseInt(ccount);

	document.write('<form name="quiz" method="GET" onsubmit="return QuestionListValidate(this)">');
		
	
	if (lastQuestion!=null)
	{
		lastQuestion = parseInt(lastQuestion);
		index = 1 + lastQuestion;
		var answerID = parseInt(QueryString("answers"));
		
		if (this.qList[lastQuestion].answerList.aList[answerID].correct)
		{
			document.write('<p class="quizRightWrong">Correct!</p>');
			ccount++;
		}
		else
		{
			var correctAnswer = this.qList[lastQuestion].GetCorrectAnswer();
			document.write('<p class="quizRightWrong">That answer was not correct.</p>');
			document.write('<p class="quizText">The correct answer to:</p>');
			document.write('<p class="quizIndent">' + this.qList[lastQuestion].text + '</p>');
			document.write('<p class="quizText">is:</p>');
			document.write('<p class="quizIndent">' + correctAnswer + '</p>');
		}
		
		
	}
	
	if (index < this.qList.length)
	{
		document.write('<input type="hidden" name="lastQuestion" value="' + index + '">')
		
		this.qList[index].WriteHTML();
		document.write('<p><input type="submit" name="submit" value="Next Question >>"></p>')
	}
	else
	{
		var score = Math.round((ccount*100)/this.qList.length);
		var scoreResults = this.ScoreResults(Math.min(Math.floor(score/10),9));
		document.write('<p class="quizText">You answered ' + ccount + ' items out of ' +
			this.qList.length + ' correctly.</p>');
		document.write('<p class="quizText">Your score is ' + score + '%. ' + scoreResults + '</p>');
	}
	
	document.write('<input type="hidden" name="ccount" value="' + ccount + '">')
	document.write('</form>');
	
}

function QuestionList_ScoreResults(index,text)
{
	// Optional Args: text
	if (arguments.length > 1)
	{
		this.scoreResults[index] = text;
	}
		
	return this.scoreResults[index];
}

function QuestionList(editor)
{
	this.sequenceID = 0;
	this.qList = new Array();
	this.scoreResults = new Array(10);
	this.editor = editor;
	
	this.NewQuestion = QuestionList_NewQuestion;
	this.Remove = QuestionList_Remove;
	this.Find = QuestionList_Find;
	this.WriteHTML = QuestionList_WriteHTML;
	this.ScoreResults = QuestionList_ScoreResults;
}

function QuestionListValidate(theForm)
{
	var validated = false;
	
	for (var i=0;i<theForm.answers.length;i++)
	{
		if (theForm.answers[i].checked == true)
		{
			validated = true;
			break;
		}
	}
	
	if (!validated)
		alert("Please select an answer before continuing.");
	
	return validated;
}

var gQuestionList = new QuestionList(null);

// Quiz Source Start (to edit with QuizEditor copy/paste between here and end
// -->
gQuestionList.ScoreResults(0,"Are you sure you are trying?");
gQuestionList.ScoreResults(1,"You may want to practice more.");
gQuestionList.ScoreResults(2,"You may want to practice more.");
gQuestionList.ScoreResults(3,"You may want to practice more.");
gQuestionList.ScoreResults(4,"You may want to practice more.");
gQuestionList.ScoreResults(5,"You may want to practice more.");
gQuestionList.ScoreResults(6,"Not bad.");
gQuestionList.ScoreResults(7,"Good job!");
gQuestionList.ScoreResults(8,"Great job!");
gQuestionList.ScoreResults(9,"Excellent job!");
q = gQuestionList.NewQuestion("Who proposed the Theory of General Relativity in 1915?");
q.NewAnswer("Albert Einstein",true);
q.NewAnswer("Abdus Salam",false);
q.NewAnswer("Edward Witten",false);
q.NewAnswer("Max Planck",false);
q = gQuestionList.NewQuestion("Who began the study of quantum mechanics with his statement that energy is quantized?");
q.NewAnswer("Brian Greene",false);
q.NewAnswer("Albert Einstein",false);
q.NewAnswer("Max Planck",true);
q.NewAnswer("Werner Heisenberg",false);
q = gQuestionList.NewQuestion("With what concept about matter is Louis de Broglie famous for?");
q.NewAnswer("Space-time is curved",false);
q.NewAnswer("Light bends as it moves",false);
q.NewAnswer("Matter has properties of both waves and particles",true);
q.NewAnswer("Strings are the basic structures of the universe.",false);
q = gQuestionList.NewQuestion("What is the conflict between General Relativity and Quantum Mechanics?");
q.NewAnswer("General Relativity deals with objects on a large scale, while quantum mechanics works with structures on a very small scale",true);
q.NewAnswer("General Relativity and Quantum Mechanics are both incorrect.",false);
q.NewAnswer("Quantum Mechanics is more accurate with general relativity",false);
q.NewAnswer("General Relavity is more accurate than Quantum Mechanics",false);
q = gQuestionList.NewQuestion("What \"model\" describes the world or particle physics and includes protons, electrons, and quarks?");
q.NewAnswer("Einstein's Model",false);
q.NewAnswer("Standard Model",true);
q.NewAnswer("General Model",false);
q.NewAnswer("String Model",false);
q = gQuestionList.NewQuestion("What is the main flaw with the Standard Model?");
q.NewAnswer("It is old and outdated",false);
q.NewAnswer("It has too many particles",false);
q.NewAnswer("It does not mention gravity",true);
q.NewAnswer("Most physicists don't believe in it's validity",false);
q = gQuestionList.NewQuestion("How small are strings approximated to be?");
q.NewAnswer("10^(-33) meters ",true);
q.NewAnswer("10^(-25) meters ",false);
q.NewAnswer("10^(-15) meters ",false);
q.NewAnswer("10^(-5) meters ",false);
q = gQuestionList.NewQuestion("\"String theory\" is really an abbreviated form of what words?");
q.NewAnswer("\"symmetrical-string\" theory",false);
q.NewAnswer("\"superstring\" theory",true);
q.NewAnswer("\"M-String\" theory",false);
q.NewAnswer("\"science-string\" theory",false);
q = gQuestionList.NewQuestion("Which relatively new theory combines the different versions of string theory into just one?");
q.NewAnswer("J-Theory",false);
q.NewAnswer("X-Theory",false);
q.NewAnswer("M-Theory",true);
q.NewAnswer("O-Theory",false);
q = gQuestionList.NewQuestion("Which two individuals envisioned extra dimensions?");
q.NewAnswer("Watson and Crick",false);
q.NewAnswer("Kaluza and Klein",true);
q.NewAnswer("Einstein and Bose",false);
q.NewAnswer("Planck and Heisenberg",false);
q = gQuestionList.NewQuestion("What was the significance of the \"first revolution\" in strings?");
q.NewAnswer("String theory became free from anomalies",true);
q.NewAnswer("String theory was first introduced",false);
q.NewAnswer("The first paper was published on string theory",false);
q.NewAnswer("String theory became accepted by all major physicists",false);
q = gQuestionList.NewQuestion("Which esteemed professor was part of the \"second revolution\" in string theory when he proposed the idea of M-theory in 1994?");
q.NewAnswer("Edward Witten",true);
q.NewAnswer("Max Planck",false);
q.NewAnswer("Sunil Mukhi",false);
q.NewAnswer("Michael Peskin",false);
q = gQuestionList.NewQuestion("How many different versions of string theory were developed?");
q.NewAnswer("Just one",false);
q.NewAnswer("Five",true);
q.NewAnswer("Eleven",false);
q.NewAnswer("Four",false);
q = gQuestionList.NewQuestion("Which tools or theoretical models did Professor Edward Witten utilize to synthesize the five different string theories?");
q.NewAnswer("Dualities",true);
q.NewAnswer("Maps",false);
q.NewAnswer("Tables",false);
q.NewAnswer("Branes",false);
q = gQuestionList.NewQuestion("What is one of the biggest flaws with string theory?");
q.NewAnswer("It cannot be confirmed experimentally",true);
q.NewAnswer("It has many anomalies",false);
q.NewAnswer("It requires too few dimensions",false);
q.NewAnswer("It is not supported by the scientific community",false);
q = gQuestionList.NewQuestion("How many dimensions are required by M-theory?");
q.NewAnswer("Seven",false);
q.NewAnswer("Four",false);
q.NewAnswer("Eleven",true);
q.NewAnswer("Three",false);

// <-- Quiz Source End