n = Math.floor(Math.random()*6);
topIMG = "image/ACMPC"+n+".jpg";

n = Math.floor(Math.random()*3);
cursor = "image/cursor"+n+".gif";

x = -100;
y = 0;

lx = -100;
ly = 0;

ex = -100;
ey = 0;
eox = 0;
eoy = 0;
eanime = 0;

ex2 = -100;
ey2 = 0;
eox2 = 0;
eoy2 = 0;
eanime2 = 0;

nx = -200;
ny = 0;
nay = 0;
nanime = 0;
banime = 0;

px = new Array(-100,-100,-100);
py = new Array(0,0,0);
dist = new Array(0,0,0);
pvx = new Array(0,0,0);
pvy = new Array(0,0,0);

ammo = 50;
hitnum = 0;
AP = 7;
NBAP = 15;

flag = false;
hit = false;
nine = false;
kadoon = false;

step = 0;

function main(){
	
	if(step == 0){
		document.topImage.src = topIMG;
		document.KARASAWA.src = cursor;
		document.body.style.cursor = "crosshair";
		AP = 7;
		NBAP = 15;
		step++;
	}
	if(document.body.clientWidth  + 24 > 830){
		if(AP > 0){
			if((hit == false)&&(flag == false)){
				window.document.onclick = fire;
			}
			window.document.onmousemove = move;
		}
	}
		
	bulletMove();
	
	if((nine == true)&&(NBAP > 0)){
		NBmove();
	}
	
	for(i=0;i<px.length;i++){
		if(px[i] > 0){
			NBbulletmove(i);
		}
	}
	
	explosionAnime();
	explosionAnime2();

	document.KARASAWA.style.left = x;
	document.KARASAWA.style.top = y-(document.KARASAWA.height/2);
	
	document.LASER.style.left = lx;
	document.LASER.style.top = ly;
	
	document.EXPLOSION.style.left = ex;
	document.EXPLOSION.style.top = ey;

	document.NB0.style.left = nx;
	document.NB0.style.top = ny;	
	
	if((banime > 5)&&(banime < 35)){
		document.BL0.style.left = nx-20;
		document.BL0.style.top = ny;
	}else{
		document.BL0.style.left = -200;
		document.BL0.style.top = 0;
	}
	if((banime > 34)&&(banime < 40)){
		document.BL1.style.left = nx+20;
		document.BL1.style.top = ny+80;
	}else{
		document.BL1.style.left = -200;
		document.BL1.style.top = 0;
	}
	if((banime > 39)&&(banime < 50)){
		document.BL2.style.left = nx+80;
		document.BL2.style.top = ny+70;
	}else{
		document.BL2.style.left = -200;
		document.BL2.style.top = 0;
	}
	if((banime > 49)&&(banime < 60)){
		document.BL3.style.left = nx+60;
		document.BL3.style.top = ny-80;
	}else{
		document.BL3.style.left = -200;
		document.BL3.style.top = 0;
	}

	if(nanime%3 == 0){
		document.NB1.style.left = -100;
		document.NB1.style.top = ny+50;
	}else{
		document.NB1.style.left = nx;
		document.NB1.style.top = ny+50;
	}
		
	document.PURSE0.style.left = px[0];
	document.PURSE0.style.top = py[0];
	document.PURSE1.style.left = px[1];
	document.PURSE1.style.top = py[1];
	document.PURSE2.style.left = px[2];
	document.PURSE2.style.top = py[2];
	
	document.EXPLOSION2.style.left = ex2;
	document.EXPLOSION2.style.top = ey2;
	
	window.setTimeout("main()",10);

}


function move(){
	x = event.x + document.body.scrollLeft;
	y = event.y + document.body.scrollTop;
}

function fire(){
	if(ammo > 0){
		flag = true;
		ammo --;
		lx = x-30;
		ly = y-5;
	}
}

function bulletMove(){
	if(flag == true){
		lx -= 30;
		
		if(
			(50 < lx)&&
			(250 > lx)&&
			(130 < ly)&&
			(180 > ly)
			){
			   bulletHit();
		}
			
		if(
			(nx+50 < lx)&&
			(nx+150 > lx)&&
			(ny+50 < ly)&&
			(ny+150 > ly)
			){
			bulletHit();
			NBAP--;
			if(NBAP < 1){
				kadoonInit(nx+70,ny+80);
			}
		}	
				
		if(lx < -100){
			flag = false;
		}
	}
}

function bulletHit(){
	flag = false;
	hit = true;
	ex = eox = lx;
	ey = eoy = ly;
	lx = -100;
	document.EXPLOSION.width = 0;
	document.EXPLOSION.height = 0;	
}

function kadoonInit(xx,yy){
	kadoon = true;
	ex2 = eox2 = xx;
	ey2 = eoy2 = yy;
	document.EXPLOSION2.width = 0;
	document.EXPLOSION2.height = 0;	
}

function explosionAnime(){
	if(hit == true){
		eanime += 8;
		document.EXPLOSION.width = eanime;
		document.EXPLOSION.height = eanime;
		ex = eox-eanime/2;
		ey = eoy-eanime/2;
		if(eanime > 100){
			document.EXPLOSION.width = 0;
			document.EXPLOSION.height = 0;
			eanime = 0;
			ex = -100;	
			ey = 0;
			hit = false;
			hitnum++;
			if(NBAP < 1){
				if(step == 3){
					document.banner.src = "../banner/ACMPC4.jpg";
					document.banner.title = "何が望みなのだ、おまえは･･･";
					step = 4;
				}
			}else if(hitnum > 9){
				if(step == 2){
					document.banner.src = "../banner/ACMPC3.jpg";
					document.banner.title = "帰れ、今ならまだ間に合う";
					step = 3;
				}
				if(nine == false){
					alert("敵ランカーＡＣを確認しました。\nナインボールです。");
					nine = true;
				}
			}else if(hitnum > 4){
				if(step == 1){
					document.banner.src = "../banner/ACMPC2.jpg";
					step = 2;
				}
			}
		}
	}
}

function explosionAnime2(){
	if(kadoon == true){
		eanime2 += 8;
		document.EXPLOSION2.width = eanime2;
		document.EXPLOSION2.height = eanime2;
		ex2 = eox2-eanime2/2;
		ey2 = eoy2-eanime2/2;
		if(eanime2 > 200){
			document.EXPLOSION2.width = 0;
			document.EXPLOSION2.height = 0;
			eanime2 = 0;
			ex2 = -100;	
			ey2 = 0;
			kadoon = false;
			if(AP < 1){
				x = -100;
				alert("防御力低下\n作戦中断帰還します。");
				document.location = "http://www.tcn.zaq.ne.jp/plasner/ACMPC/menu.html";
			}
			if(NBAP < 1){
				nx = -200;
				for(i=0;i<px.length;i++){
					px[i] = -100;
				}
			}
		}
	}
}


function NBmove(){
	nanime++;
	if(nanime > 100){
		nanime = 0;
	}
	if((y-(ny+100) < 300)&&(x > nx+200)&&(nx > -10)){
		for(i=0;i<px.length;i++){
			if(nanime%3==0){
				if(px[i] < 0){
					NBshot(i);
					break;
				}
			}
		}
	}
	
	if((x-nx < 200)&&(x > nx+10)){
		if(banime == 0){	
			banime = 5;
			nx += 10;
		}
	}
	if(banime > 0){
		banime+=5;
		if((banime > 25)&&(banime < 60)){
			if(
				(nx+10 < x+10)&&
				(nx+200 > x+10)&&
				(ny+50 < y+50)&&
				(ny+150 > y+50)
				){
				AP = 0;
				kadoonInit(x+50,y+5);
				x = -100;
				
			}
		}
		if(banime > 100){
			banime = 0;
		}
	}

	if((lx - nx > 300)&&(lx > 100)){
		nx += 10;
	}
	else if(x < nx){
		nx -= 10;
	}
	else if((x-nx > 600)||(nx < 0)){
		nx += 10;
	}
	if((ly - ny > 100)&&(lx > 100)){
		if(ly > y){
			if(nay > 20)nay-=5;
		}else{
			if(nay < 20)nay+=5;
		}
	}else if(y > ny+100){
		if(nay < 10)nay++;
	}else{
		if(nay > -10)nay-=2;
	}
	ny += nay;
}

function NBshot(n){
	px[n] = nx+100;
	py[n] = ny+70;
	dist[n] = Math.sqrt((x-px[n])*(x-px[n])+(y-py[n])*(y-py[n]));
	pvx[n] = ((x-px[n])/dist[n])*25;
	pvy[n] = ((y-py[n])/dist[n])*25;
}

function NBbulletmove(n){
	
	px[n] += pvx[n];
	py[n] += pvy[n];
	
	if(
		(px[n] < x+80)&&
		(px[n] > x+10)&&
		(py[n] < y+50)&&
		(py[n] > y)
		){
			px[n] = -100;
			AP--;
			if(AP < 1){
				kadoonInit(x+50,y+5);
				x = -100;
			}
		}
		
	if(px[n] > document.body.clientWidth  + 20){
		px[n] = -100;
		py[n] = 0;
	}

}