var animation=275;     // STARTING ANIMATION SPEED IN MILLISECONDS
var incr=8;            // THE INCREASE IN ANIMATION SPEED PER LEVEL IN MILLISECONDS
var minan=50;          // MINIMUM DELAY (MAX ANIMATION SPEED) ALLOWED IN MILLISECONDS.
var wy=130;             // OFFSET FROM TOP OF PAGE. SET THIS TO HIGHER VALUE IF YOU HAVE A "BANNER" SITE.

//******** DO NOT EDIT BEYOND THIS POINT ********//

var w3c=(document.getElementById)?true:false;
var ns4=(document.layers)?true:false;
var ie4=(document.all && !w3c)?true:false;
var ie5=(document.all && w3c)?true:false;
var ns6=(w3c && navigator.appName.indexOf("Netscape")>=0)?true:false;
var gophers=new Array(), backdrop, hammer, text , gx , wx , smash;
var hit=0, strikes=0, missed=0, counter=0, id=0, level=1, oktoplay=true, currentG=0;
var xcoords=[0,110,240,370,76,182,288,394,95,230,365];
var ycoords=[0,58,58,58,105,105,105,105,178,178,178];
var gwidths=[0,20,20,20,30,30,30,30,40,40,40];
var gheights=[0,30,30,30,45,45,45,45,60,60,60];
var cache=new Array();
cache[0]=new Image(); cache[0].src="down.gif";
cache[1]=new Image(); cache[1].src="up.gif";
cache[2]=new Image(); cache[2].src="down.gif";

function init(){
backdrop=getid('backdrop');
hammer=getid('hammer');
smash=(ns4)? document.layers['hammer'].document.images['smash'] : document.images['smash'];
text=getid('text');
updatescore();
wx=(ie4||ie5)?document.body.clientWidth:window.innerWidth;
moveidto( backdrop, (wx-500)/2, wy);
moveidto( text, (wx-300)/2, wy+250+10);
for(i=1;i<=10;i++){
gophers[i]=new gopher(i);
clipelement(gophers[i].ID, 0 ,gophers[i].w, 5, 0);
moveidto(gophers[i].ID , xcoords[i]+(wx-500)/2 , ycoords[i]+wy);
}
if(ns4)document.captureEvents(Event.MOUSEMOVE | Event.KEYPRESS | Event.MOUSEDOWN | Event.MOUSEUP);
document.onmousemove=moveobj;
document.onkeypress=pausegame;
document.onmousedown=function(){
  if(oktoplay)smack();
}
document.onmouseup=function(){
  smash.src="up.gif";
}
window.onresize=function(){
  if(ns4)setTimeout('history.go(0)',400);
}
alert('INSTRUKTIONER:\n\n- Slå Gophern i huvudet när den tittar upp genom hålet.\n- Fart och nivå ökar efter var 5:e Gopher.\n- Spelet slutar när du har missat 20st Gopher.\n- Du ska använda musmarkören när du ska träffa Gophern, inte hammaren.\n   (Hammaren är bara för syns skull...).\n- Tryck på tangentbordet för att pausa spelet.\n\nTryck "Ok" för att starta spelet.');
getgophernum();
id=setInterval('animate()', animation);
}

function getid(id){
if(ns4) return document.layers[id];
else if(ie4)return document.all[id];
else return document.getElementById(id);
}

function gopher(i){
this.ID=getid('g'+i);
this.ID.i=i;
this.w=gwidths[i];
this.h=gheights[i];
this.ctr=0;
this.step=this.h/5;
this.up=true;
this.clipamnt=5;
if(ns4)this.ID.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
this.ID.onmouseover=function(){
  currentG=this.i;
}
this.ID.onmouseout=function(){
  currentG=0;
}}

function pausegame(){
	clearInterval(id);
	alert('Game paused...\n\nPress "Ok" to continue.');
	id=setInterval('animate()' , animation);
}

function updatescore(){
	var per=(Math.floor((hit/strikes*1000))/10);
	if(isNaN(per))per='?';
		var tmptxt='<form method="post" action="save_game.asp"><table cellpadding="2" cellspacing="0" border="0" width="250"><tr><td align="left" width="190">Nivå:</td><td align="left" width="60"><input type="hidden" name="level" value="'+level+'">'+level+'</td></tr><tr><td align="left">Gopher hit:</td><td align="left"><input type="hidden" name="hit" value="'+hit+'">'+hit+'</td></tr><tr><td align="left">Gopher missar:</td><td align="left"><input type="hidden" name="missed" value="'+missed+'">'+missed+'</td></tr><tr><td align="left">Hål-träff:</td><td align="left"><input type="hidden" name="strikes" value="'+strikes+'">'+strikes+'</td></tr><tr><td align="left">Träffsäkerhet:</td><td align="left"><input type="hidden" name="accuracy" value="'+per+'">'+per+'%</td></tr><tr><td><input type="submit" name="Spara" value="Spara"></td><td><input type="button" onclick="history.go(0);" name="Starta om!" value="Starta om!"></td></tr></table></form>';
		if(ns4){
			text.document.open();
			text.document.write('<div style="position:absolute; left:0px; top:0px;">'+tmptxt+'</div>');
			text.document.close();
		}else text.innerHTML=tmptxt;
}

function moveobj(evt){
	var ex=(ie4||ie5)?event.clientX:evt.pageX;
	var ey=(ie4||ie5)?event.clientY:evt.pageY;
	moveidto(hammer,ex-10,ey-53);
	return false;
}

function smack(){
	smash.src="down.gif"; 
	strikes++;
	updatescore();
	if(currentG!=0){
		var gtmp=gophers[currentG];
		if(gtmp.ctr!=0){
			counter++;
			chkspeed();
			clearInterval(id);
			moveidto(gophers[gx].ID , xcoords[currentG]+(wx-500)/2 , ycoords[currentG]+wy);
			clipelement(gophers[gx].ID, 0, gophers[gx].w, 5, 0);
			gophers[gx].ctr=0;
			gophers[gx].clipamnt=5;
			gophers[gx].up=true;
			getgophernum();
			hit++;
			id=setInterval('animate()',animation);
		}
	}
}

function animate(){
var clipdir=(gophers[gx].up)? '+' : '-';
eval('gophers[gx].clipamnt'+clipdir+'='+gophers[gx].step);
clipelement(gophers[gx].ID , 0 , gophers[gx].w , gophers[gx].clipamnt , 0);
var ga=(gophers[gx].up)? -gophers[gx].step : gophers[gx].step;
if(ns4)gophers[gx].ID.top=gophers[gx].ID.top+ga;
else gophers[gx].ID.style.top=parseInt(gophers[gx].ID.style.top)+ga+'px';
gophers[gx].ctr++;
if(gophers[gx].ctr==4)gophers[gx].up=false;
if((gophers[gx].ctr==0)||(gophers[gx].ctr==8)){
clearTimeout(id);
missed++;
updatescore();
if(missed==20){
	gophers[gx].ctr=0;
	oktoplay=false;
	alert('Du klarade dig till nivå '+level+'.');
	//history.go(0);
	return false;
}else{
gophers[gx].ctr=0;
gophers[gx].clipamnt=5;
gophers[gx].up=true;
getgophernum();
counter++;
chkspeed();
id=setInterval('animate()',animation);
}}}

function chkspeed(){
if((counter%5)==0){
if(animation>=minan)animation=animation-incr;
level++;
updatescore();
}}

function moveidto(id,x,y){
if(ns4)id.moveTo(x,y);
else{
id.style.left=x+'px';
id.style.top=y+'px';
}}

function clipelement(id, ctop, cright, cbot, cleft){
if(ns4){
id.clip.left= cleft;
id.clip.top=ctop;
id.clip.right=cright;
id.clip.bottom=cbot;
}
else id.style.clip='rect('+ctop+' '+cright+' '+cbot+' '+cleft+')';
}

function getgophernum(){
gx=Math.floor(Math.random()*10)+1;
}

window.onload=init;