var includeCaption = 0;   // Turn on the "caption" feature, and write out the caption HTML
var zoomTime       = 5;   // Milliseconds between frames of zoom animation
var zoomSteps      = 15;  // Number of zoom animation frames
var fade           = 1;   // Fade images in / out
var minBorder      = 100;  // Amount of padding between large, scaled down images, and the window edges

var zoomImageURI   = 'http://palatyn.pl/palatyn/temp/_data/img/'; // Location of the zoom images

// Init. Do not add anything below this line, unless it's something awesome.

var myWidth = 0, myHeight = 0, myScroll = 0; myScrollWidth = 0; myScrollHeight = 0;
var zoomOpen = false, preloadFrame = 1, preloadActive = false, preloadTime = 0, imgPreload = new Image();

var zoomActive = new Array(); var zoomTimer  = new Array(); 
var zoomOrigW  = new Array(); var zoomOrigH  = new Array();
var zoomOrigX  = new Array(); var zoomOrigY  = new Array();

var zoomID    = "ZoomBox";
var theID     = "ZoomImage";
var theCap    = "ZoomCaption";
var theCapDiv = "ZoomCapDiv";

function setupZoom() {
	prepZooms();
	insertZoomHTML();
	zoomdiv = document.getElementById(zoomID);  
	zoomimg = document.getElementById(theID);
}

function prepZooms() {
	if (! document.getElementsByTagName) {
		return;
	}
	var links = document.getElementsByTagName("a");
	for (i = 0; i < links.length; i++) {
		if (links[i].getAttribute("href") && (links[i].getAttribute("rel"))) {
			if (links[i].getAttribute("rel").indexOf("zoom:") == 0) {
				links[i].onclick = function () { zoomClick(this); return false; };
				links[i].onmouseover = function () { zoomPreload(this); };
			}
		}
	}
}

// Zoom: Preload a zoom image when hovering over the thumbnail, then set the image once the preload is complete.

function zoomPreload(from) {

	var theimage = from.getAttribute("href");
	if (imgPreload.src.indexOf(from.getAttribute("href").substr(from.getAttribute("href").lastIndexOf("/"))) == -1) {
		preloadActive = true;
		imgPreload = new Image();
		imgPreload.onload = function() {
			preloadActive = false;
		}

		imgPreload.src = theimage;
	}
}

function preloadAnimStart() {
	preloadTime = new Date();
	document.getElementById("ZoomSpin").style.left = (myWidth / 2) + 'px';
	document.getElementById("ZoomSpin").style.top = ((myHeight / 2) + myScroll) + 'px';
	document.getElementById("ZoomSpin").style.visibility = "visible";	
	document.getElementById("ZoomSpin").innerHTML='<img src="http://palatyn.pl/palatyn/temp/_data/img/loading.gif" alt=""/>';//1

	preloadAnimTimer = setInterval("preloadAnim()", 100);
}

function preloadAnim(from) {
	if (preloadActive != false) {
		preloadFrame++;
		if (preloadFrame > 12) preloadFrame = 1;
	} else {
		document.getElementById("ZoomSpin").style.visibility = "hidden";    
		clearInterval(preloadAnimTimer);
		zoomIn(preloadFrom);
	}
}

function zoomClick(from) {
	getSize();

	if (preloadActive == true) {
		preloadFrom = from;
		preloadAnimStart();
	} else {
		zoomIn(from);
	}
}

function zoomIn(from) {
	zoomimg.src = from.getAttribute("href");
	if (from.childNodes[0].width) {
		startW = from.childNodes[0].width;
		startH = from.childNodes[0].height;
		startPos = findElementPos(from.childNodes[0]);
	} else {
		startW = 50;
		startH = 12;
		startPos = findElementPos(from);
	}
	hostX = startPos[0];
	hostY = startPos[1];
	if (document.getElementById('scroller')) {
		hostX = hostX - document.getElementById('scroller').scrollLeft;
	}
	endW = imgPreload.width;
	endH = imgPreload.height;
  
	if (zoomActive[theID] != true) {
     
		document.getElementById("ShadowBox").style.visibility = "hidden";
		document.getElementById("ZoomClose").style.visibility = "hidden";     
  
		if (includeCaption == 1) {
			zoomcap  = document.getElementById(theCap);
			zoomcapd = document.getElementById(theCapDiv);
       
			if (from.getAttribute('title') && includeCaption == 1) {
				zoomcapd.style.display = 'block';
				zoomcap.innerHTML = from.getAttribute('title');
			} else {
				zoomcapd.style.display = 'none';
			}
       
		}   
		zoomOrigW[theID] = startW;
		zoomOrigH[theID] = startH;
		zoomOrigX[theID] = hostX;
		zoomOrigY[theID] = hostY;
          
		zoomimg.style.width = startW + 'px';
		zoomimg.style.height = startH + 'px';
		zoomdiv.style.left = hostX + 'px';
		zoomdiv.style.top = hostY + 'px';
     
		if (fade == 1) {
			setOpacity(0, zoomID);
		}
		zoomdiv.style.visibility = "visible";
  
		sizeRatio = endW / endH;
		if (endW > myWidth - minBorder) {
			endW = myWidth - minBorder;
			endH = endW / sizeRatio;
		}
		if (endH > myHeight - minBorder) {
			endH = myHeight - minBorder;
			endW = endH * sizeRatio;
		}

		zoomChangeX = ((myWidth / 2) - (endW / 2) - hostX)                 + 200;
		zoomChangeY = (((myHeight / 2) - (endH / 2) - hostY) + myScroll)   + 80;
		zoomChangeW = (endW - startW);
		zoomChangeH = (endH - startH);
		
		zoomCurrent = 0;
     
		if (fade == 1) {
			fadeCurrent = 0;
			fadeAmount = (0 - 100) / zoomSteps;
		} else {
			fadeAmount = 0;
		}
       
		zoomTimer[theID] = setInterval("zoomElement('"+zoomID+"', '"+theID+"', "+zoomCurrent+", "+startW+", "+zoomChangeW+", "+startH+", "+zoomChangeH+", "+hostX+", "+zoomChangeX+", "+hostY+", "+zoomChangeY+", "+zoomSteps+", "+fade+", "+fadeAmount+", 'zoomDoneIn(zoomID)')", zoomTime);		
		zoomActive[theID] = true; 
	}
}

function zoomOut() {

	if (zoomActive[theID] != true) {
     
		document.getElementById("ShadowBox").style.visibility = "hidden";
		document.getElementById("ZoomClose").style.visibility = "hidden";

		startX = parseInt(zoomdiv.style.left);
		startY = parseInt(zoomdiv.style.top);
		startW = zoomimg.width;
		startH = zoomimg.height;
		zoomChangeX = zoomOrigX[theID] - startX;
		zoomChangeY = zoomOrigY[theID] - startY;
		zoomChangeW = zoomOrigW[theID] - startW;
		zoomChangeH = zoomOrigH[theID] - startH;
	   
		zoomCurrent = 0;
     
		if (fade == 1) {
			fadeCurrent = 0;
			fadeAmount = (100 - 0) / zoomSteps;
		} else {
			fadeAmount = 0;
		}
     
		zoomTimer[theID] = setInterval("zoomElement('"+zoomID+"', '"+theID+"', "+zoomCurrent+", "+startW+", "+zoomChangeW+", "+startH+", "+zoomChangeH+", "+startX+", "+zoomChangeX+", "+startY+", "+zoomChangeY+", "+zoomSteps+", "+fade+", "+fadeAmount+", 'zoomDone(zoomID, theID)')", zoomTime);	
		zoomActive[theID] = true;
   }
}

function zoomDoneIn(zoomdiv, theID) {

	zoomOpen = true;

	setOpacity(0, "ShadowBox");
	setOpacity(0, "ZoomClose");

	zoomdiv = document.getElementById(zoomdiv);
	shadowdiv = document.getElementById("ShadowBox");
 
	shadowLeft = parseInt(zoomdiv.style.left) - 13;
	shadowTop = parseInt(zoomdiv.style.top) - 8;
	shadowWidth = zoomdiv.offsetWidth + 26;
	shadowHeight = zoomdiv.offsetHeight + 26; 

	shadowdiv.style.width = shadowWidth + 'px';
	shadowdiv.style.height = shadowHeight + 'px';
	shadowdiv.style.left = shadowLeft + 'px';
	shadowdiv.style.top = shadowTop + 'px';
  
	document.getElementById("ShadowBox").style.visibility = "visible";
	fadeElementSetup("ShadowBox", 0, 100, 5);
	document.getElementById("ZoomClose").style.visibility = "visible";
	fadeElementSetup("ZoomClose", 0, 100, 5);
}

function zoomDone(zoomdiv, theID) {
	zoomOpen = false;

	zoomOrigH[theID] = "";
	zoomOrigW[theID] = "";
	document.getElementById(zoomdiv).style.visibility = "hidden";
	zoomActive[theID] == false;
}

function zoomElement(zoomdiv, theID, zoomCurrent, zoomStartW, zoomChangeW, zoomStartH, zoomChangeH, zoomStartX, zoomChangeX, zoomStartY, zoomChangeY, zoomSteps, fade, fadeAmount, execWhenDone) {

	if (zoomCurrent == (zoomSteps + 1)) {
		zoomActive[theID] = false;
		clearInterval(zoomTimer[theID]);

		if (execWhenDone != "") {
			eval(execWhenDone);
		}
	} else {
	  
		if (fade != 0) {
			if (fadeAmount < 0) {
				setOpacity(Math.abs(zoomCurrent * fadeAmount), zoomdiv);
			} else {
				setOpacity(100 - (zoomCurrent * fadeAmount), zoomdiv);
			}
		}
		
		moveW = cubicInOut(zoomCurrent, zoomStartW, zoomChangeW, zoomSteps);
		moveH = cubicInOut(zoomCurrent, zoomStartH, zoomChangeH, zoomSteps);
		moveX = cubicInOut(zoomCurrent, zoomStartX, zoomChangeX, zoomSteps);
		moveY = cubicInOut(zoomCurrent, zoomStartY, zoomChangeY, zoomSteps);
	
		document.getElementById(zoomdiv).style.left = moveX + 'px';
		document.getElementById(zoomdiv).style.top = moveY + 'px';
		zoomimg.style.width = moveW + 'px';
		zoomimg.style.height = moveH + 'px';
	
		zoomCurrent++;
		
		clearInterval(zoomTimer[theID]);
		zoomTimer[theID] = setInterval("zoomElement('"+zoomdiv+"', '"+theID+"', "+zoomCurrent+", "+zoomStartW+", "+zoomChangeW+", "+zoomStartH+", "+zoomChangeH+", "+zoomStartX+", "+zoomChangeX+", "+zoomStartY+", "+zoomChangeY+", "+zoomSteps+", "+fade+", "+fadeAmount+", '"+execWhenDone+"')", zoomTime);
	}
}

function zoomMouseOver() {
}

function zoomMouseOut() {
}


function fadeOut(elem) {
	if (elem.id) {
		fadeElementSetup(elem.id, 100, 0, 10);
	}
}

function fadeIn(elem) {
	if (elem.id) {
		fadeElementSetup(elem.id, 0, 100, 10);	
	}
}

var fadeActive = new Array();
var fadeQueue  = new Array();
var fadeTimer  = new Array();
var fadeClose  = new Array();

function fadeElementSetup(theID, fdStart, fdEnd, fdSteps, fdClose) {

	if (fadeActive[theID] == true) {
		fadeQueue[theID] = new Array(theID, fdStart, fdEnd, fdSteps);
	} else {
		fadeSteps = fdSteps;
		fadeCurrent = 0;
		fadeAmount = (fdStart - fdEnd) / fadeSteps;
		fadeTimer[theID] = setInterval("fadeElement('"+theID+"', '"+fadeCurrent+"', '"+fadeAmount+"', '"+fadeSteps+"')", 15);
		fadeActive[theID] = true;
		if (fdClose == 1) {
			fadeClose[theID] = true;
		} else {
			fadeClose[theID] = false;
		}
	}
}

function fadeElement(theID, fadeCurrent, fadeAmount, fadeSteps) {
  
	if (fadeCurrent == fadeSteps) {

	    clearInterval(fadeTimer[theID]);
	    fadeActive[theID] = false;
	    
	    if (fadeClose[theID] == true) {
	    	document.getElementById(theID).style.visibility = "hidden";
	    }
	    
	    if (fadeQueue[theID] && fadeQueue[theID] != false) {
	    	fadeElementSetup(fadeQueue[theID][0], fadeQueue[theID][1], fadeQueue[theID][2], fadeQueue[theID][3]);
	    	fadeQueue[theID] = false;
	    }  
  
	} else {
  
		fadeCurrent++;
		
		if (fadeAmount < 0) {
			setOpacity(Math.abs(fadeCurrent * fadeAmount), theID);
		} else {
			setOpacity(100 - (fadeCurrent * fadeAmount), theID);
		}
		
		clearInterval(fadeTimer[theID]);
		fadeTimer[theID] = setInterval("fadeElement('"+theID+"', '"+fadeCurrent+"', '"+fadeAmount+"', '"+fadeSteps+"')", 15);
	}
}







function setOpacity(opacity, theID) {

	var object = document.getElementById(theID).style;

	if (navigator.userAgent.indexOf("Firefox") != -1) {
		if (opacity == 100) { opacity = 99.9999; } // This is majorly retarded
	}

	object.filter = "alpha(opacity=" + opacity + ")"; // IE/Win
	object.opacity = (opacity / 100);                 // Safari 1.2, Firefox+Mozilla

}

function linear(t, b, c, d)
{
	return c*t/d + b;
}

function sineInOut(t, b, c, d)
{
	return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
}

function cubicIn(t, b, c, d) {
	return c*(t/=d)*t*t + b;
}

function cubicOut(t, b, c, d) {
	return c*((t=t/d-1)*t*t + 1) + b;
}

function cubicInOut(t, b, c, d)
{
	if ((t/=d/2) < 1) return c/2*t*t*t + b;
	return c/2*((t-=2)*t*t + 2) + b;
}

function bounceOut(t, b, c, d)
{
	if ((t/=d) < (1/2.75)){
		return c*(7.5625*t*t) + b;
	} else if (t < (2/2.75)){
		return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
	} else if (t < (2.5/2.75)){
		return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
	} else {
		return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
	}
}


function getSize() {
	if (document.all) {
		// IE4+ or IE6+ in standards compliant 
		myWidth  = (document.documentElement.clientWidth) ? document.documentElement.clientWidth : document.body.clientWidth;
		myHeight = (document.documentElement.clientHeight) ? document.documentElement.clientHeight : document.body.clientHeight;
		myScroll = (document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;
	} else {
		// Non-IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
		myScroll = window.pageYOffset;
	}
	
    if (window.innerHeight && window.scrollMaxY) {	
        myScrollWidth = document.body.scrollWidth;
		myScrollHeight = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac
		myScrollWidth = document.body.scrollWidth;
		myScrollHeight = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		myScrollWidth = document.body.offsetWidth;
		myScrollHeight = document.body.offsetHeight;
	}
	
	myWidth=myWidth;//TODO
	myHeight=myHeight;
}

function findElementPos(elemFind)
{
	var elemX = 0;
	var elemY = 0;
	do {
		elemX += elemFind.offsetLeft;
		elemY += elemFind.offsetTop;
	} while ( elemFind = elemFind.offsetParent )
	return Array(elemX, elemY);
}


//
// ----- DISPLAY CODE -----
//

function insertZoomHTML() {

  var inBody = document.getElementsByTagName("body").item(0);
  
  var inSpinbox = document.createElement("div");
  inSpinbox.setAttribute('id', 'ZoomSpin');
  inSpinbox.style.position = 'absolute';
  inSpinbox.style.left = '10px';
  inSpinbox.style.top = '10px';
  inSpinbox.style.visibility = 'hidden';
  inSpinbox.style.zIndex = '5000';
  inBody.insertBefore(inSpinbox, inBody.firstChild);
  
  var inSpinImage = document.createElement("img");
  inSpinImage.setAttribute('id', 'SpinImage');
  inSpinImage.setAttribute('src', 'http://palatyn.pl/palatyn/temp/_data/img/loading.gif');//2
  inSpinbox.appendChild(inSpinImage);

  var inZoombox = document.createElement("div");
  inZoombox.setAttribute('id', 'ZoomBox');
  inZoombox.style.position = 'absolute'; 
  inZoombox.style.left = '10px';
  inZoombox.style.top = '10px';
  inZoombox.style.visibility = 'hidden';
  inZoombox.style.zIndex = '499';
  inBody.insertBefore(inZoombox, inSpinbox.nextSibling);

  var inLink1 = document.createElement("a");
  inLink1.setAttribute('href','javascript:zoomOut();');
  inZoombox.appendChild(inLink1);
  
  var inImage1 = document.createElement("img");
  inImage1.setAttribute('src',zoomImageURI+'dot.gif');
  inImage1.setAttribute('id','ZoomImage');
  inImage1.setAttribute('border', '0');
  inImage1.setAttribute('onMouseOver', 'zoomMouseOver();')
  inImage1.setAttribute('onMouseOut', 'zoomMouseOut();')
  inImage1.style.display = 'block';
  inImage1.style.width = '10px';
  inImage1.style.height = '10px';
  inLink1.appendChild(inImage1);

  var inClosebox = document.createElement("div");
  inClosebox.setAttribute('id', 'ZoomClose');
  inClosebox.style.position = 'absolute';
  inClosebox.style.left = '-15px';
  inClosebox.style.top = '-15px';
  inClosebox.style.filter = 'alpha(opacity=0)';
  inClosebox.style.MozOpacity = '0';
  inClosebox.style.opacity = '0';
  inClosebox.style.visibility = 'hidden';
  inZoombox.appendChild(inClosebox);
  
  var inLink2 = document.createElement("a");
  inLink2.setAttribute('href','javascript:zoomOut(1);return 0;');
  inClosebox.appendChild(inLink2);




//////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////

  var inShadowbox = document.createElement("div");
  inShadowbox.setAttribute('id', 'ShadowBox');
  inShadowbox.style.position = 'absolute'; 
  inShadowbox.style.left = '50px';
  inShadowbox.style.top = '50px';
  inShadowbox.style.width = '100px';
  inShadowbox.style.height = '100px';
  inShadowbox.style.visibility = 'hidden';
  inShadowbox.style.zIndex = '45';
  inBody.insertBefore(inShadowbox, inZoombox.nextSibling);
 
  if (includeCaption == 1) {
    var inCapDiv = document.createElement("div");
    inCapDiv.setAttribute('id', 'ZoomCapDiv');
    inCapDiv.style.display = 'none';
    inCapDiv.style.marginLeft = '13px';
    inCapDiv.style.marginRight = '13px';
    inShadowbox.appendChild(inCapDiv);
  }
}