var animateSpeed = 3;
var object = null;
var cX = null;
var cY = null;
var fX = null;
var fY = null;
var next = null;
var radius = null;
var cardtwoanswer;
var cardoneanswer;
var blank = " ";
var cover;
var coverfocus;
var maxnumber = 12;
var cardfocus = 2;
var numberquestions = 25;
var displayquestions = 25;
var checknumber = 2;
var testonoff = "0";
var questioncounter = 0;
var questionscorrect = 0;
var lastanswer = 0;
var lastcorrectanswer = 0;
var lastoperandone = 0;
var lastoperandtwo = 0;
var setcheck;
var score;


function initAnimateCircle(objectID, theRadius) {

	if (testonoff=="1" && lastanswer=="1") {
		questionscorrect++;
		document.getElementById("correctCounter").innerHTML = questionscorrect;
		document.getElementById("feedback").style.visibility="hidden"
	};

	if (testonoff=="1" && lastanswer=="0") {
		document.getElementById("feedback").innerHTML = lastoperandone + " + " + lastoperandtwo + " = " + lastcorrectanswer;
		document.getElementById("feedback").style.visibility="visible"
	};



	if (testonoff=="1" && parseInt(questioncounter) < (parseInt(numberquestions)-1)) {
		questioncounter++;
		document.getElementById("questionsCounter").innerHTML = questioncounter
	}

	else {
		if (testonoff=="1"){
			questioncounter++;
			document.getElementById("questionsCounter").innerHTML = questioncounter;
			score = parseInt((questionscorrect/questioncounter)*100);
			alert ("That's it!\nYou got " + questionscorrect + " out of " + questioncounter + " correct.\n" + "That is a score of " + score + "%.\n" +
			"Press OK to return to practice cards.");
			refreshtest();

		}

	}

	cover = document.getElementById('cover');
	cover.style.zIndex = "99";

	object = document.getElementById(objectID);
	radius = theRadius;
	cX = fX = object.offsetLeft;
	cY = fY = object.offsetTop;


	next = 1;
	animateObjectCircle();


	resetIndex();

	

	objectzindex = document.getElementById('card1');

}





	function animateObjectCircle() {

		window.status="Type in your answer! It will change color when correct.";

	if (next < 144){
		var nX = cX + (Math.cos(next*(Math.PI/72))*radius);
		var nY = cY + (Math.sin(next*(Math.PI/72))*radius);
		object.style.left=Math.round(nX)+'px';
		object.style.top=Math.round(nY)+'px';
		cX = nX;
		cY = nY;
		next++;
			
			if (next>72) object.style.zIndex="-1000";
 			if (next>72) object.style.backgroundColor="#eee";	
 			if (next>72) object.style.borderColor="#ddd";
			if (next>16) document.getElementById("yes").style.visibility="hidden";	

		setTimeout('animateObjectCircle()',animateSpeed);
}
	else{
		object.style.left = fX + 'px';
		object.style.top = fY + 'px';
cover.style.zIndex = "-99";
}



return;
}

function resetIndex(){
	var cardone=document.getElementById('card1');
	var cardtwo=document.getElementById('card2');
	cardone.style.backgroundColor = "#fff";
	cardtwo.style.backgroundColor = "#fff";
	cardone.style.borderColor = "#000";
	cardtwo.style.borderColor = "#000";
lastanswer="0";





	if (cardone.style.zIndex > cardtwo.style.zIndex) {
		cardone.style.zIndex = 3;
		cardtwo.style.zIndex = 1;
		document.getElementById("spannumber21").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) );
		document.getElementById("spannumber22").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) );
  		cardtwoanswer = parseInt(document.getElementById("spannumber21").innerText)+parseInt(document.getElementById("spannumber22").innerText);	
		document.getElementById("spannumber23").innerText = blank;
		document.getElementById("Answer2").value = blank;
		cardtwo.style.color="green";


		lastcorrectanswer = cardtwoanswer;
		lastoperandone = document.getElementById("spannumber21").innerText;
		lastoperandtwo = document.getElementById("spannumber22").innerText;


		document.getElementById('Answer2').focus();
		coverfocus = 2;


		}
	else	{
		cardone.style.zIndex = 1;
		cardtwo.style.zIndex = 3;
		document.getElementById("spannumber11").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) );
		document.getElementById("spannumber12").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) );
  		cardoneanswer = parseInt(document.getElementById("spannumber11").innerText)+parseInt(document.getElementById("spannumber12").innerText);
		document.getElementById("spannumber13").innerText = blank;
		document.getElementById("Answer1").value = blank;
		cardone.style.color="green";

		lastcorrectanswer = cardoneanswer;
		lastoperandone = document.getElementById("spannumber11").innerText;
		lastoperandtwo = document.getElementById("spannumber12").innerText;

		document.getElementById('Answer1').focus();
		coverfocus = 1;

		}


}

function initCard(){

window.status="Type the answer.  It will change color when it is correct!";

setcheck = document.getElementById("checkButton");
setcheck.src = "check.gif";

document.getElementById("spannumber11").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) )
document.getElementById("spannumber12").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) )
cardoneanswer = parseInt(document.getElementById("spannumber11").innerText)+parseInt(document.getElementById("spannumber12").innerText)
document.getElementById("spannumber21").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) )
document.getElementById("spannumber22").innerText = Math.round(Math.floor((maxnumber - 0 + 1) * Math.random() + 0) )
cardtwoanswer = parseInt(document.getElementById("spannumber21").innerText)+parseInt(document.getElementById("spannumber22").innerText)
document.getElementById('Answer2').focus();
coverfocus = 2;
cover = document.getElementById('cover');
cover.style.zIndex = "-99";
lastcorrectanswer = cardtwoanswer;
		lastoperandone = document.getElementById("spannumber21").innerText;
		lastoperandtwo = document.getElementById("spannumber22").innerText;
}


function shuffle () {

document.getElementById("card2").click();


}


function Get_Number2()
{
  var Input = document.getElementById("Answer2")
  var Output = document.getElementById("spannumber23")
  Output.innerText = Input.value;

	if (cardtwoanswer==Output.innerText) document.getElementById("yes").style.visibility="visible";
	if (cardtwoanswer==Output.innerText && testonoff=="0") {

		document.getElementById("card2").style.color="purple";

	}

	else {

		document.getElementById("card2").style.color="green";

	}


	if (cardtwoanswer==Output.innerText) {
		lastanswer="1"}
	else {
		lastanswer="0"
	};
	if (cardtwoanswer!=Output.innerText) document.getElementById("yes").style.visibility="hidden";

  var evt = (evt) ? evt : ((window.event) ? event : null);
  var charCode = (evt.charCode) ? evt.char.Code : evt.keyCode;
  if (charCode == 13 && cover.style.zIndex == "-99") initAnimateCircle('card2',40);



}

function Get_Number1()
{
  var Input = document.getElementById("Answer1")
  var Output = document.getElementById("spannumber13")
  Output.innerText = Input.value;

	if (cardoneanswer==Output.innerText) document.getElementById("yes").style.visibility="visible";

	if (cardoneanswer==Output.innerText  && testonoff=="0") {

		document.getElementById("card1").style.color="purple";

	}

	else {

		document.getElementById("card1").style.color="green";

	}

	if (cardoneanswer==Output.innerText) {
		lastanswer="1"}
	else {
		lastanswer="0"
	};


	if (cardoneanswer!=Output.innerText) document.getElementById("yes").style.visibility="hidden";

  var evt = (evt) ? evt : ((window.event) ? event : null);
  var charCode = (evt.charCode) ? evt.char.Code : evt.keyCode;
  if (charCode == 13 && cover.style.zIndex == "-99") initAnimateCircle('card1',40);




}

function Cover_Focus()
{
	if (coverfocus==2) {

	
	document.getElementById('Answer2').select();
	}
	else		{
	document.getElementById('Answer1').select();
	}	


}

function changecard()
{
	if (document.getElementById('card1').zIndex > document.getElementById('card2').zIndex) {
	document.getElementById('card1').click();
	}
	else		{
	document.getElementById('card2').click();
	} 

}

function changeoperator(num)
{
maxnumber=num;
document.getElementById("spannumber23").innerText="";
document.getElementById("spannumber13").innerText="";
document.getElementById("Answer1").value = blank; document.getElementById("Answer2").value = blank;
document.getElementById("card1").style.backgroundColor = "#fff";
document.getElementById("card2").style.backgroundColor = "#fff";
document.getElementById("card1").style.color="green";
document.getElementById("card2").style.color="green";
document.getElementById("card2").style.zIndex="3";
document.getElementById("card1").style.zIndex="1";

if (maxnumber==1) {
	 document.getElementById("one").style.visibility = "visible"
	}
	else {
	 document.getElementById("one").style.visibility = "hidden"
	};
if (maxnumber==2) {
	 document.getElementById("two").style.visibility = "visible"
	}
	else {
	 document.getElementById("two").style.visibility = "hidden"
	};
if (maxnumber==3) {
	 document.getElementById("three").style.visibility = "visible"
	}
	else {
	 document.getElementById("three").style.visibility = "hidden"
	};
if (maxnumber==4) {
	 document.getElementById("four").style.visibility = "visible"
	}
	else {
	 document.getElementById("four").style.visibility = "hidden"
	};
if (maxnumber==5) {
	 document.getElementById("five").style.visibility = "visible"
	}
	else {
	 document.getElementById("five").style.visibility = "hidden"
	};
if (maxnumber==6) {
	 document.getElementById("six").style.visibility = "visible"
	}
	else {
	 document.getElementById("six").style.visibility = "hidden"
	};
if (maxnumber==7) {
	 document.getElementById("seven").style.visibility = "visible"
	}
	else {
	 document.getElementById("seven").style.visibility = "hidden"
	};
if (maxnumber==8) {
	 document.getElementById("eight").style.visibility = "visible"
	}
	else {
	 document.getElementById("eight").style.visibility = "hidden"
	};
if (maxnumber==9) {
	 document.getElementById("nine").style.visibility = "visible"
	}
	else {
	 document.getElementById("nine").style.visibility = "hidden"
	};
if (maxnumber==10) {
	 document.getElementById("ten").style.visibility = "visible"
	}
	else {
	 document.getElementById("ten").style.visibility = "hidden"
	};
if (maxnumber==11) {
	 document.getElementById("eleven").style.visibility = "visible"
	}
	else {
	 document.getElementById("eleven").style.visibility = "hidden"
	};
if (maxnumber==12) {
	 document.getElementById("twelve").style.visibility = "visible"
	}
	else {
	 document.getElementById("twelve").style.visibility = "hidden"
	}




initCard();
}

function decrease()


{
	
	if (checknumber==0) {
	checknumber=5
	}
	else		    {
	checknumber --;
	}

checkanumber();

}

function checkanumber(){	

	switch (checknumber)
	    {
    		case 0:
      			numberquestions = 5;
			displayquestions = 5;
      			break;
      		case 1:
      			numberquestions = 10;
			displayquestions =10;

      			break;
      		case 2:
			numberquestions = 25;
			displayquestions = 25;

      			break;
      		case 3:
      			numberquestions = 50;
			displayquestions = 50;

      			break;
      		case 4:
      			numberquestions = 100;
			displayquestions = 100;

      			break;

      		case 5:
      			numberquestions = 100000;
			displayquestions = "";

      			break;

    }
	
   	var Output = document.getElementById("numberOfQuestions");
   	Output.innerText = displayquestions;
}	

function increase()
{
	if (checknumber==5) {
	checknumber=0
	}
	else		    {
	checknumber ++;
	}

checkanumber();

}	

function refreshtest()
{
	if (testonoff=="0") {

		testonoff = "1";
		lastanswer="0";
		questioncounter = 0;
		document.getElementById("questionsCounter").innerHTML = "0";
		questionscorrect = 0;
		document.getElementById("correctCounter").innerHTML = "0";
		setcheck = document.getElementById("checkButton");
		setcheck.src = "checkgreen.gif";
		document.getElementById("numbersign").style.visibility = "visible";
		document.getElementById("arrowup").style.visibility = "visible";
		document.getElementById("arrowdown").style.visibility = "visible";
		document.getElementById("questionsCounter").style.visibility = "visible";
		document.getElementById("correctCounter").style.visibility = "visible";
		document.getElementById("numberOfQuestions").style.visibility = "visible";
		document.getElementById("helpme").style.visibility = "hidden";


	}

	else {
		testonoff = "0";
		lastanswer="0";
		questioncounter = 0;
		document.getElementById("questionsCounter").innerHTML = "0";
		questionscorrect = 0;
		document.getElementById("correctCounter").innerHTML = "0";
		document.getElementById("numbersign").style.visibility = "hidden";
		document.getElementById("arrowup").style.visibility = "hidden";
		document.getElementById("arrowdown").style.visibility = "hidden";
		document.getElementById("questionsCounter").style.visibility = "hidden";
		document.getElementById("correctCounter").style.visibility = "hidden";
		document.getElementById("numberOfQuestions").style.visibility = "hidden";
                document.getElementById("feedback").style.visibility = "hidden";
		document.getElementById("helpme").style.visibility = "visible";
		setcheck = document.getElementById("checkButton");
		setcheck.src = "check.gif";


	}


}

function refreshcheck()
{
	if (testonoff=="0") {

		setcheck = document.getElementById("checkButton");
		setcheck.src = "check.gif";
	}

	else {

		setcheck = document.getElementById("checkButton");
		setcheck.src = "checkgreen.gif";

	}
}