// set up array.push() function for older browsers
function Array_push() {
  var A_p = 0
  for (A_p = 0; A_p < arguments.length; A_p++) {
   this[this.length] = arguments[A_p]
   }
  return this.length
  }

if (typeof Array.prototype.push == "undefined") {
 Array.prototype.push = Array_push
 }
 // == MM FUNCTIONS +++++++
 
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_setTextOfLayer(objName,x,newText) { //v4.01
  if ((obj=MM_findObj(objName))!=null) with (obj)
    if (document.layers) {document.write(unescape(newText)); document.close();}
    else innerHTML = unescape(newText);
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
// modified to not restore on curent section rollOut's
  var i,x,a=document.MM_sr; 
  for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) {
	  if (x.name != "link"+document.ActiveS){
		x.src=x.oSrc;
	 }
  }
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
// ===== DISPLAY FUNCTIONS ======
function displayCounter(s,p){
//ActiveS = ActiveS;
	var size = 0;
	var myPage = 0;
	for (var i = 0; i<page_arr.length; i++){
	//alert(page_arr[i].length);
		size += page_arr[i].length;
		if (s>i){
		myPage = myPage+page_arr[i].length;
		} else if (s==i){
		myPage = myPage+(p+1)
		}	
	}
	if (document.ActiveS){
	
	
			
			MM_swapImage('link'+(document.ActiveS),'','images/link'+(document.ActiveS)+'.gif',1);
			//document.ActiveS = SPtr+1;	
		
	}
	MM_swapImage('link'+(s+1),'','images/link'+(s+1)+'-over.gif',1);
	document.ActiveS = (s+1);
	MM_setTextOfLayer('pagemarker','',(myPage)+' of '+size);
//
}

// ==== NAVIGATION FUNCTIONS =====
function NavNext(){
	if (page_arr.length-1 == SPtr && page_arr[SPtr].length-1 == PPtr){
		// last page in presentation
		alert("this is the last page");
	} else {
		// get new page pointer (PPtr)
		if (page_arr[SPtr].length-1 > PPtr){
			PPtr++;
		} else if (SPtr < page_arr.length-1) {
		// new section
			SPtr++;
			PPtr = 0;
		} 
	var myPage = page_arr[SPtr][PPtr];
	parent.frames[0].location=myPage;
	displayCounter(SPtr,PPtr);
	}		
}
//
function NavBack(){
	if (SPtr == 0 && PPtr == 0){
	// first page
	alert("This is the first page.");
	} else {
	// get new page pointer (PPtr)
		if (PPtr == 0 && SPtr > 0){
		// new section
			SPtr--;
			PPtr = page_arr[SPtr].length-1;
		} else if (PPtr > 0) {
			PPtr--;
		} 
	var myPage = page_arr[SPtr][PPtr];
	parent.frames[0].location=myPage;
	displayCounter(SPtr,PPtr);
	}
}
//
function GetParam(name)
{
  var start=location.search.indexOf("?"+name+"=");
  if (start<0) start=location.search.indexOf("&"+name+"=");
  if (start<0) return '';
  start += name.length+2;
  var end=location.search.indexOf("&",start)-1;
  if (end<0) end=location.search.length;
  var result=location.search.substring(start,end);
  var result='';
  for(var i=start;i<=end;i++) {
    var c=location.search.charAt(i);
    result=result+(c=='+'?' ':c);
  }
  return unescape(result);
}
function jumpToImg(numb, galery){
	//
	var myPage = page_arr[galery][numb];
	parent.frames['stage'].location = myPage;
	ptr = numb;
}
function nextGalPage(){
	if (!ptr){ptr=0;}
	ptr++;
	var myPage = page_arr[currentGal][ptr];
	if (ptr < page_arr[currentGal].length){
		// next image
		parent.frames['stage'].location = myPage;
	} else {
		// no more images in this galery
		if (currentGal<(totalGals-1)){
			// show next galery
			currentGal++;
			document.location="?gal="+currentGal;
		
		} else {
			// no more galeries
			alert ('Last page, no more galeries.');
			ptr=page_arr[currentGal].length;
		}
	}
	
	
}
function prevGalPage(){
	if (!ptr){ptr=0;}
	ptr--;
	var myPage = page_arr[currentGal][ptr];
	if (ptr >= 0){
		// previous image
		parent.frames['stage'].location = myPage;
	} else {
		// no more images in this galery
		if (currentGal>0){
			// total images in prev Gal
			var totPg = (page_arr[currentGal-1].length)-1
			// show previous galery
			currentGal--;
			document.location="?gal="+currentGal+"&pg="+totPg;
		
		} else {
			// no more galeries
			alert ('First page, gallery can\'t go back');
			ptr=0;
		}
	}
	
	
}
function buildThumbs(galery, cols){
	currentGal = galery;
			maxCol = cols;
			count =0;
			totalGals = page_arr.length;
			for (var i=1; i<=page_arr[galery].length; i++){
			var filePieces = page_arr[galery][i-1].split(".");
			var myThumb = "galery/thumbs/"+filePieces[0]+".jpg"
			//var myPage = page_arr[galery][i-1];
			if (count>maxCol-1){
				document.write("</tr><tr align=\"center\" valign=\"top\">");
				count=0;
				}
			document.write("<td><a href=\"javascript:jumpToImg("+(i-1)+", "+galery+")\"><img src=\""+myThumb+"\" class=\"galthumb\"></a></td>");
			count++;
			if (i==page_arr[galery].length){
				document.write("</tr>");
				}
			}
}
//
function gotoSection(sect){

	var myPage = page_arr[sect][0];
	parent.frames[0].location=myPage;
	SPtr = sect;
	PPtr = 0;
	//alert(ActiveS);
	//if (ActiveS != null){
	//MM_swapImage('link'+(ActiveS),'','images/link'+(ActiveS)+'.gif',1);
	//}
	
	displayCounter(sect,0)
	
}
// below are unused and needs to be updated ======


function gotoPageNumber(numb){

	size = page_arr.length;
	pointer = numb;
	var myPage = page_arr[numb];
	parent.frames[0].location=myPage;
	//alert('page '+(pointer+1)+' of '+size);
	MM_setTextOfLayer('pagemarker','','page '+(pointer+1)+' of '+size);
}
//
function gotoPageName(name){
size = page_arr.length;
	for (var a=0; a<page_arr.length; a++){
	var myPage = page_arr[a];
		if (name == myPage){
		// its a match
		pointer=a;
		parent.frames[0].location=myPage;
		MM_setTextOfLayer('pagemarker','','page '+(pointer+1)+' of '+size);
		break;
		}
	}
}