// scripts for rand-online.com

// Zoomeffekt Anfahrtskizze: Variablen werden definiert
var photos=new Array()
var which=0

// Zoomeffekt Anfahrtskizze: Dateinamen werden vorgegeben
photos[0]="../img/map_level0.jpg"
photos[1]="../img/map_level1.jpg"
photos[2]="../img/map_level2.jpg"
photos[3]="../img/map_level3.jpg"
photos[4]="../img/map_level4.jpg"
photos[5]="../img/map_level5.jpg"

// Zoomeffekt Anfahrtskizze: Dateinamen der Icons werden definiert
// Icons müssen unter dem Dateinamen 
//    stringIconPrefix + Nummer (0-n) + stringOn + stringIconSuffix bzw.
//    stringIconPrefix + Nummer (0-n) + stringOff + stringIconSuffix
// vorliegen

var stringOn="_on"
var stringOff="_off"
var stringIconPrefix="../img/map_icon"
var stringIconSuffix=".jpg"

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

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_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_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];}
}

function preloadphotos() {
	var preloadedimages=new Array()
	for (i=0;i<photos.length;i++){
		preloadedimages[i]=new Image()
		preloadedimages[i].src=photos[i]
	}
}

function applyeffect(){
	if (document.all){
	photoslider.filters.revealTrans.Transition=Math.floor(Math.random()+3)
	photoslider.filters.revealTrans.stop()
	photoslider.filters.revealTrans.apply()
	}
}

function playeffect(){
	if (document.all)
	photoslider.filters.revealTrans.play()
}

//function keeptrack(){
//	window.status="Image "+(which+1)+" of "+photos.length
//}

function replaceimage () {
	var iconname
	applyeffect()
	document.images.photoslider.src=photos[which]
	playeffect()
	for (i=0;i<photos.length;i++){
		iconname="icon"+i
		if (i==which) {
			document.images[iconname].src=stringIconPrefix + i + stringOn + stringIconSuffix
		}
		else {
			document.images[iconname].src=stringIconPrefix + i + stringOff + stringIconSuffix		
		}
	}

}
		
function backward(){
	if (which>0){
		which--
		replaceimage()
		//keeptrack()
	}
}

function jumpto(n){
	if ((n>=0)&(n<photos.length)&(n!=which)){
		which=n
		replaceimage()
		//keeptrack()
	}
}

function forward(){
	if (which<photos.length-1){
		which++
		replaceimage()
		//keeptrack()
	}
}