var vrfr=new Array(frames);

var RGraphicWidth=GraphicWidth+WinWidth;
var Steps=(Math.round(WinWidth/blocksize));
var halfsteps=0;

var WinWidth=Steps*blocksize;

var j=0;

var CurrentPanoX=(-WinWidth);
var CurrentPanoY=((WinHeight/2)-(GraphicHeight/2));

var REF=new Array(Steps);
var sy=new Array(Steps);

var BI=document.all,BQ=document.layers,BZ=document.getElementById;

var mouseisup=1;
var moving=0;
var go=0;

var degree=0;
var degreestep=180/(Steps-1);
var distoffset=0;

for (i=0; i<frames; i++) {
	vrfr[i]=new Image();
	vrfr[i].src=prefix+i+"."+suffix;
	}

function setup() {
	for (i=0; i<halfsteps; i++) {
		if (BZ) {
			REF[i]=document.getElementById('slice'+i);
			}
		else if (BQ) {
			REF[i]=document['pano'].document['slice'+i];
			}
		else if (BI) {
			REF[i]=document.all['slice'+i];
			}
		}
	go=1;
	runmovie();
	moveit();
	}
	
function spinpano() {
	if (go) {
		if (BQ) {document.captureEvents(Event.MOUSEMOVE | Event.MOUSEUP);}
		document.onmouseup=stoptracking;
		document.onmousemove=starttracking;
		}
	}

function starttracking(evt) {
	if (BQ) {
		Xpos=evt.pageX;
		Ypos=evt.pageY;
		}
	else if (BI) {
		Xpos=window.event.clientX;
		Ypos=window.event.clientY;
		window.event.cancelBubble='true';
		}
	else if (BZ) {
		Xpos=evt.clientX;
		Ypos=evt.clientY;
		}
	if (mouseisup) {
		StartX = Xpos;
		StartY = Ypos;
		mouseisup=0;
		}
	ymoveby=(StartY-Ypos)*factor;
	xmoveby=(StartX-Xpos)*factor;
	if (ymoveby<-range) {ymoveby=-range;}
	if (ymoveby>range) {ymoveby=range;}
	if (xmoveby<-range) {xmoveby=-range;}
	if (xmoveby>range) {xmoveby=range;}
	if (!(moving)) {moveit();}
	return false;
	}
			
function stoptracking(evt) {
	clearTimeout(PanTimer);
	if (BQ) {
		document.releaseEvents(Event.MOUSEMOVE | Event.MOUSEUP);
		}
	else if (BI) {
		document.onmousemove=null;
		document.onclick=null;
		window.event.cancelBubble=true;
		}
	else if (BZ) {
		document.onclick=null;
		document.onmousemove=null;
		}
	mouseisup=1;
	moving=0;
	}
	
function moveit() {	
	NewPanoX=(CurrentPanoX+xmoveby);
	NewPanoY=(CurrentPanoY+ymoveby);
	if (NewPanoX>0) {NewPanoX=(WinWidth-RGraphicWidth)+blocksize;}
	if (NewPanoX<(WinWidth-RGraphicWidth)) {NewPanoX=-blocksize;}
	
	if (NewPanoY<(WinHeight-GraphicHeight)) {NewPanoY=(WinHeight-GraphicHeight);}
	if (NewPanoY>0) {NewPanoY=0;}
	
	if (BQ) {drawnet();}
	else {drawie();}
		
	CurrentPanoX=NewPanoX;
	CurrentPanoY=NewPanoY;

	if (go) {
		moving=1;
		PanTimer = setTimeout('moveit()',panspeed);
		}
	}

function drawnet() {
	for (n=0; n<halfsteps; n++) {
		rn=n*blocksize;
		PTop=(NewPanoY+sy[n]);
		TopClip=-(NewPanoY+sy[n]);
		BottomClip=-(NewPanoY-(WinHeight-sy[n]));
		LeftClip=(-NewPanoX+rn);
		RightClip=(-NewPanoX+WinWidth)-rn;
		REF[n].moveTo(NewPanoX,(PTop));
		REF[n].clip.top=TopClip;
		REF[n].clip.right=RightClip;
		REF[n].clip.bottom=BottomClip;
		REF[n].clip.left=LeftClip;
		}
	}
	
function drawie() {
	for (n=0; n<halfsteps; n++) {
		rn=n*blocksize;
		PTop=(NewPanoY+sy[n]);
		TopClip=-(NewPanoY+sy[n]);
		BottomClip=-(NewPanoY-(WinHeight-sy[n]));
		LeftClip=(-NewPanoX+rn);
		RightClip=(-NewPanoX+WinWidth)-rn;
		REF[n].style.left=(NewPanoX)+"px";
		REF[n].style.top=(PTop)+"px";
		REF[n].style.clip='rect('+TopClip+'px '+RightClip+'px '+BottomClip+'px '+LeftClip+'px)';
		}
	}
	
function runmovie() {
	if (j>=frames) {j=0;}
	for (n=0; n<halfsteps; n++) {
		document['vrmovie'+n].src=vrfr[j].src;
		}
	j++;
	if (frames>1) {MovieID= setTimeout('runmovie()',moviespeed);}
	}