var x=600;
var level=1;
var trial=1;
var number_to_analyze=Math.floor(Math.random()*900+199);

var obj=new Array(100);
var trial=1;
var mousex=0, mousey=0;
var ready_for_a_new_trial="false";
var number_to_extract_temp=100;
var sentence1="";
var str1=" ";
var trialminus1=0;
var number_animation_time_counter=0;
var number_animation_time_counter_active="false";
var rand1,rand2,rand3,rand4,repeatthis,number1,number2,number3,number4;
var mishtaneezer;
var dontshow=false;
var score=0;
var targetnumber;
var tempnumber;


	pic1= new Image(1024,768); pic1.src="./rounding-spaceships_images/Earth.jpg"; 
	pic2= new Image(90,37); pic2.src="./rounding-spaceships_images/spaceship1.gif"; 

var delay=15;





function init_main(){


//	document.onmousemove=handlemousemove;
	document.onmousedown=handlemousedown;
	document.onmouseup=handlemouseup;

	document.getElementById("div_instructions").style.visibility="hidden";
	document.getElementById("div_imgthumb").style.visibility="hidden";
	document.getElementById("div_linkbacktomenu").style.visibility="hidden";
	document.getElementById("div_linkbacktomathgames").style.visibility="hidden";



	document.body.style.background="url('"+pic1.src+"') black top left no-repeat fixed "


	for (i=1; i<5; i++) {
		obj[i]=new obj_prototype();	
	}

	obj[1].y=45;	obj[2].y=140;	obj[3].y=240;	obj[4].y=340;


	init_this_task_variables();

	assign_divs_and_images_to_objects();	

	run_main_animation();

}

function init_this_task_variables(){

	document.getElementById("div_spaceship1").style.visibility="visible";
	document.getElementById("div_spaceship2").style.visibility="visible";
	document.getElementById("div_spaceship3").style.visibility="visible";
	document.getElementById("div_spaceship4").style.visibility="visible";

	document.getElementById("div_targetnumber").style.visibility="visible";


	document.getElementById("div_btnrun").style.visibility="hidden";
	document.getElementById("div_exittomenu").style.visibility="visible";

	document.getElementById("div_score1").style.visibility="visible";
	document.getElementById("div_score1").style.left=20;
	document.getElementById("div_score1").style.top=500;


	set_numbers_to_spaceships();
	
}


         
function set_numbers_to_spaceships(){

	repeatthis=true;

	while (repeatthis==true) {

		rand1=Math.floor(Math.random()*10);
		rand2=Math.floor(Math.random()*10);
		rand3=Math.floor(Math.random()*10);
		rand4=Math.floor(Math.random()*8)+1;

		if (rand1==rand2||rand1==rand3||rand1==rand4||rand2==rand3||rand2==rand4||rand3==rand4) {repeatthis=true}
		else {repeatthis=false}

	}

	targetnumber=rand1*1000+rand2*100+rand3*10+rand4;

	document.getElementById("txbx_score1").value=score;

	temprand=Math.floor(Math.random()*4);	


	if (temprand==0){

		if (rand4>=5)		{number1=rand1*1000+rand2*100+(rand3+1)*10		}  else {number1=rand1*1000+rand2*100+(rand3*10) }
		if (rand4<5)		{number2=rand1*1000+rand2*100+(rand3+1)*10		}  else {number2=rand1*1000+rand2*100+(rand3*10) }
		if (rand3>=5)		{number3=rand1*1000+(rand2+1)*100		}  else {number3=rand1*1000+rand2*100 }
		if (rand3<5)		{number4=rand1*1000+(rand2+1)*100		}  else {number4=rand1*1000+rand2*100 }

		if (number1==number2||number1==number3||number1==number4||number2==number3||number2==number4||number3==number4)		{ temprand=1}
	}

	if (temprand==1){

		if (rand4>=5)		{number1=rand1*1000+rand2*100+(rand3+1)*10		}  else {number1=rand1*1000+rand2*100+(rand3*10) }
		if (rand4<5)		{number2=rand1*1000+rand2*100+(rand3+1)*10		}  else {number2=rand1*1000+rand2*100+(rand3*10) }
		if (rand3>=5)		{number3=rand1*1000+(rand2+1)*100+rand4		}  else {number3=rand1*1000+rand2*100+rand4 }
		if (rand3<5)		{number4=rand1*1000+(rand2+1)*100+rand4		}  else {number4=rand1*1000+rand2*100+rand4 }

		if (number1==number2||number1==number3||number1==number4||number2==number3||number2==number4||number3==number4)		{ temprand=2}
	}


	if (temprand==2){

		if (rand4>=5)		{number1=rand1*1000+rand2*100+(rand3+1)*10		}  else {number1=rand1*1000+rand2*100+(rand3*10) }
		if (rand4<5)		{number2=rand1*1000+rand2*100+(rand3+1)*10		}  else {number2=rand1*1000+rand2*100+(rand3*10) }
		if (rand4>=5)		{number3=rand1*1000+rand2*100+100+(rand3+1)*10		}  else {number3=rand1*1000+rand2*100-100+(rand3*10) }
		if (rand4<5)		{number4=rand1*1000+rand2*100+100+(rand3+1)*10		}  else {number4=rand1*1000+rand2*100-100+(rand3*10) }

		if (number1==number2||number1==number3||number1==number4||number2==number3||number2==number4||number3==number4)		{ temprand=3}
	}

	if (temprand==3){

		if (rand4>=5)		{number1=rand1*1000+rand2*100+(rand3+1)*10		}  else {number1=rand1*1000+rand2*100+(rand3*10) }
		if (rand4<5)		{number2=rand1*1000+rand2*100+(rand3+1)*10		}  else {number2=rand1*1000+rand2*100+(rand3*10) }
		if (rand4>=5)		{number3=rand1*1000+rand2*100+(rand3+2)*10		}  else {number3=rand1*1000+rand2*100+((rand3-1)*10) }
		if (rand4<5)		{number4=rand1*1000+rand2*100+(rand3+2)*10		}  else {number4=rand1*1000+rand2*100+((rand3-1)*10) }

	}





for (i3=0;i3<=350 ;i3++ ){	
	temprand=Math.floor(Math.random()*4);	

		if (temprand==0)		{tempnumber=obj[1].y;	obj[1].y=obj[2].y;	obj[2].y=tempnumber;}
		if (temprand==1)		{tempnumber=obj[2].y;	obj[2].y=obj[3].y;	obj[3].y=tempnumber;}
		if (temprand==2)		{tempnumber=obj[3].y;	obj[3].y=obj[4].y;	obj[4].y=tempnumber;}
		if (temprand==3)		{tempnumber=obj[4].y;	obj[4].y=obj[1].y;	obj[1].y=tempnumber;}

}


	obj[1].istarget=true;
	obj[2].istarget=false;
	obj[3].istarget=false;
	obj[4].istarget=false;


	document.getElementById("txbx_number1").value=number1;
	document.getElementById("txbx_number2").value=number2;
	document.getElementById("txbx_number3").value=number3;
	document.getElementById("txbx_number4").value=number4;
	
	sentence1=" עגל את המספר הבא לעשרות: "+targetnumber;
	document.getElementById("txbx_targetnumber").value=sentence1;	









}


function assign_divs_and_images_to_objects(){ 

		
			document.getElementById("div_spaceship1").style.left=obj[1].x;
			document.getElementById("div_spaceship1").style.top=obj[1].y;
			document.getElementById("img_spaceship1").style.width=obj[1].sizex;
			document.getElementById("img_spaceship1").style.height=obj[1].sizey;
			document.getElementById("div_number1").style.left=obj[1].x+obj[1].xnumber;
			document.getElementById("div_number1").style.top=obj[1].y+obj[1].ynumber;

			document.getElementById("div_spaceship2").style.left=obj[2].x;
			document.getElementById("div_spaceship2").style.top=obj[2].y;
			document.getElementById("img_spaceship2").style.width=obj[2].sizex;
			document.getElementById("img_spaceship2").style.height=obj[2].sizey;
			document.getElementById("div_number2").style.left=obj[2].x+obj[2].xnumber;
			document.getElementById("div_number2").style.top=obj[2].y+obj[2].ynumber;

			document.getElementById("div_spaceship3").style.left=obj[3].x;
			document.getElementById("div_spaceship3").style.top=obj[3].y;
			document.getElementById("img_spaceship3").style.width=obj[3].sizex;
			document.getElementById("img_spaceship3").style.height=obj[3].sizey;
			document.getElementById("div_number3").style.left=obj[3].x+obj[3].xnumber;
			document.getElementById("div_number3").style.top=obj[3].y+obj[3].ynumber;

			document.getElementById("div_spaceship4").style.left=obj[4].x;
			document.getElementById("div_spaceship4").style.top=obj[4].y;
			document.getElementById("img_spaceship4").style.width=obj[4].sizex;
			document.getElementById("img_spaceship4").style.height=obj[4].sizey;
			document.getElementById("div_number4").style.left=obj[4].x+obj[4].xnumber;
			document.getElementById("div_number4").style.top=obj[4].y+obj[4].ynumber;



}

function set_locations_to_spaceships(){

	for (i1=1; i1<5; i1++){
		obj[i1].x=Math.floor(Math.random()*400+150);
		obj[i1].animationstage=0;
		obj[i1].timer1=100;

	}



}




function obj_prototype(){

	this.x=Math.floor(Math.random()*400+150);
	this.y=Math.floor(Math.random()*400+10);
	this.xnumber=14;
	this.ynumber=32;
	this.numbervalue=4837;
	this.movex=1;
	this.movey=0;
	this.istarget=false;
	this.animationstage=0;
	this.timer1=100;
	this.moveacceleration=0;
	this.sizex=90;
	this.sizey=37;

}



function run_main_animation(){

	for (i=1; i<5; i++){

		if (obj[i].animationstage==0){

			if (dontshow==false) document.getElementById("div_number"+i).style.visibility="visible";



			if (obj[i].timer1>0) {
				
				obj[i].timer1=obj[i].timer1-0.5;
				mishtaneezer=100-obj[i].timer1;
				document.getElementById("div_spaceship"+i).style.filter = 'alpha(opacity=' + mishtaneezer + ')';
				document.getElementById("div_number"+i).style.filter = 'alpha(opacity=' + mishtaneezer + ')';

				if (obj[i].timer1<95) dontshow=false;  //this is to show the spaceships and numbers in their new locations only after set their opacity to transparent.

				

			} else {
				obj[i].timer1=0;
				obj[i].animationstage=1;
				}

		}



		if (obj[i].animationstage==1){

			obj[i].x=obj[i].x+obj[i].movex;
		
			if (obj[i].x>=900||obj[i].x<=40) obj[i].movex=obj[i].movex*(-1);

			temprand=Math.floor(Math.random()*60);
			if (temprand==1) {obj[i].movex=obj[i].movex+0.3}
			if (temprand==2) {obj[i].movex=obj[i].movex-0.3}
			
			if (obj[i].movex>1.5) obj[i].movex=1.5;
			if (obj[i].movex<-1.5) obj[i].movex=-1.5;

			temprand=Math.floor(Math.random()*20);
			if (Math.random()*20>19) {obj[i].y=obj[i].y-1} 
			else {if (Math.random()*20>19) {obj[i].y=obj[i].y+1} }



		}

		if (obj[i].animationstage==2){
			obj[i].movey=-2.5;
			obj[i].moveacceleration=0.05;

				document.getElementById("div_number1").style.visibility="hidden";
				document.getElementById("div_number2").style.visibility="hidden";
				document.getElementById("div_number3").style.visibility="hidden";
				document.getElementById("div_number4").style.visibility="hidden";


			obj[i].animationstage=21;
			
			document.getElementById("div_spaceship"+i).style.zIndex="0";

		}




		if (obj[i].animationstage==21){    			//animating the spacship landing
			obj[i].moveacceleration=obj[i].moveacceleration*1.01;
			obj[i].movey=obj[i].movey+obj[i].moveacceleration;
			obj[i].y=obj[i].y+obj[i].movey/1.5;
			obj[i].sizex=obj[i].sizex+obj[i].movey/1.5; // if (obj[i].sizex<20) obj[i].sizex=20;
			obj[i].sizey=obj[i].sizey+obj[i].movey/4; //if (obj[i].sizey<10) obj[i].sizey=10;


			if (obj[i].movey>20) {				//bringing everything back to normal, and starting new values and locations

				score=score+1; 
				document.getElementById("txbx_score1").value=score;

				for (i2=1; i2<5; i2++){


					dontshow=true;
					obj[1].y=45;	obj[2].y=140;	obj[3].y=240;	obj[4].y=340;
					set_numbers_to_spaceships();					
					set_locations_to_spaceships();
					

					obj[i2].animationstage=0;


					obj[i2].movey=0;
					obj[i2].moveacceleration=0;


					obj[i2].sizex=90;
					obj[i2].sizey=37;

				}

				if (score%20==0){
					for (i2=1; i2<5; i2++){
						obj[i2].animationstage=3;

					}

				document.getElementById("div_btncontinue").style.visibility="visible";	


				document.getElementById("div_btnrestart").style.visibility="visible";	

							     
				document.getElementById("div_btnbacktomenu").style.visibility="visible";	


				document.getElementById("div_exittomenu").style.visibility="hidden";	

				document.getElementById("div_targetnumber").style.visibility="hidden";	

				sentence1="כל הכבוד! שלחת בהצלחה לדרכן "+score+" חלליות!";
				document.getElementById("txbx_sentence1").value=sentence1;	
				document.getElementById("div_sentence1").style.visibility="visible";	

					

				}


			}
		}

		if (obj[i].animationstage==3){

			document.getElementById("div_spaceship1").style.visibility="hidden";
			document.getElementById("div_spaceship2").style.visibility="hidden";
			document.getElementById("div_spaceship3").style.visibility="hidden";
			document.getElementById("div_spaceship4").style.visibility="hidden";

			document.getElementById("div_number1").style.visibility="hidden";
			document.getElementById("div_number2").style.visibility="hidden";
			document.getElementById("div_number3").style.visibility="hidden";
			document.getElementById("div_number4").style.visibility="hidden";
			
		}

		


	
	}



	if (dontshow==false) assign_divs_and_images_to_objects();



	setTimeout('run_main_animation()',delay);
}


function continuegame(){

	for (i2=1; i2<5; i2++){
		obj[i2].animationstage=0;
	}

	document.getElementById("div_spaceship1").style.visibility="visible";
	document.getElementById("div_spaceship2").style.visibility="visible";
	document.getElementById("div_spaceship3").style.visibility="visible";
	document.getElementById("div_spaceship4").style.visibility="visible";
	document.getElementById("div_targetnumber").style.visibility="visible";


	document.getElementById("div_btncontinue").style.visibility="hidden";	
	document.getElementById("div_btnrestart").style.visibility="hidden";	
	document.getElementById("div_btnbacktomenu").style.visibility="hidden";
	document.getElementById("div_exittomenu").style.visibility="visible";	
	document.getElementById("div_sentence1").style.visibility="hidden";

	dontshow=true;


}


function EvalSound(soundobj) {
  	var thissound=document.getElementById(soundobj);


  	thissound.Play();

}


         






function handlemousedown(evt) {

	var e = (window.event) ? window.event : evt; 


	if (e.pageX)  {  				//firefox

		mousex=e.pageX; //event.clientX;
		mousey=e.pageY; //event.clientY;
	} else {  					//IE
		mousex=event.clientX;
		mousey=event.clientY;

	}



	for (i=1; i<5; i++){
		if (checkforcontact(i)=="true") {            
			if (obj[i].istarget==true) {
				obj[i].animationstage=2;
				obj[i].timer1=100;

				EvalSound('sound_correct');


			}

			else {
				 EvalSound('sound_wrong');
			}

		}
		

	}

	

	return false;
}

function handlemouseup(evt) {

	ready_for_a_new_trial="true";


	return false;
}


function checkforcontact(i){

var rtemp="false";


		x1=obj[i].x; x2=obj[i].x+90;
		y1=obj[i].y; y2=obj[i].y+70;


		x3=mousex; 	x4=mousex+2;
		y3=mousey; 	y4=mousey+2;
	
		if(x3>x1&&x3<x2&&y3>y1&&y3<y2) rtemp="true";
		if(x4>x1&&x4<x2&&y3>y1&&y3<y2) rtemp="true";
		if(x3>x1&&x3<x2&&y4>y1&&y4<y2) rtemp="true";
		if(x4>x1&&x4<x2&&y4>y1&&y4<y2) rtemp="true";
		
		if(x2>x3&&x2<x4&&y2>y3&&y2<y4) rtemp="true";
		if(x1>x3&&x1<x4&&y2>y3&&y2<y4) rtemp="true";
		if(x2>x3&&x2<x4&&y1>y3&&y1<y4) rtemp="true";
		if(x1>x3&&x1<x4&&y1>y3&&y1<y4) rtemp="true";	


	
	return rtemp;
}