function phover (serieno,id) {

	var fotoanz = document.getElementById("photoseries_anz_" + serieno).value;

	for (i = 1; i <= fotoanz; i++) {
		if (i != id) document.getElementById("photo_" + serieno + "-"  + i).className = "photoserie_pic transparent";
		else document.getElementById("photo_" + serieno + "-"  + i).className = "photoserie_pic";
	}
}

function phout (serieno) {
	var fotoanz = document.getElementById("photoseries_anz_" + serieno).value;

	for (i = 1; i <= fotoanz; i++) {
		document.getElementById("photo_" + serieno + "-"  + i).className = "photoserie_pic";
	}
}

function phclick(serieno,nr) {
	var toppos = document.body.scrollTop;
	document.getElementById("previewbg").style.marginTop = toppos;
	document.getElementById("previewbox_" + serieno).style.marginTop = toppos + 10;
	var picname = document.getElementById("photoname_" + serieno + "-" + nr).value;
	photoobj = document.getElementById("photoimg_" + serieno + "-" + nr);
	photoobj.src = picname;
		
	var windim = getWindowSize();
	var winheight = windim[1];
	
	var picwidth  = document.getElementById("photowidth_" + serieno + "-" + nr).value;
	var picheight = document.getElementById("photoheight_" + serieno + "-" + nr).value;
	
	//alert(picwidth + "/" + picheight);
			
	var framemargin = 120;
	var lineheight = 20;
	
	if (document.getElementById("phototext_" + serieno + "-" + nr)) {
		var fototext = document.getElementById("phototext_" + serieno + "-" + nr).innerHTML;
		var fototext_nobr = fototext.replace(new RegExp("\\n","g"),"");
		var lineanz = fototext.length - fototext_nobr.length + 1;
		framemargin = framemargin + lineanz * lineheight;
	}
	
	// Evt. Übergröße ermitteln und Bild kleiner darstellen
		
	var pictyp = picname.substr((picname.length-3),3);
	
	if (pictyp == "jpg") {
		
		if (picheight > (winheight - framemargin)) {
			var newheight = winheight - framemargin;
			var newwidth = picwidth * (newheight / picheight);
			newheight = Math.floor(newheight);
			newwidth = Math.floor(newwidth);
			
			photoobj.height = newheight;
			photoobj.width = newwidth;
			
			picname = picname.substr(0,(picname.length-4));
			//picname = picname + "_" + newheight + "x" + newwidth + "_hb.jpg";
			
			picheight = newheight;
		}
	}
	
	// Bild vertikal mittig ausrichten
	
	//alert(winheight+"/"+picheight+"/"+framemargin);
	
	var marginoben = (winheight - picheight - framemargin) / 2;
	marginoben = Math.floor(marginoben);
	if (marginoben > 0) {
		photoobj.style.marginTop = marginoben;
	}

	
	setopacity(photoobj,0);
	document.getElementById("previewbox_" + serieno).style.display = "block";
	document.getElementById("photobox_" + serieno + "-" + nr).style.display = "block";	
	
	openpreview();
	
	fade("photoimg_" + serieno + "-" + nr,0,1,2);
	document.getElementById("photoserie_" + serieno + "_shown").value = nr;
	
	checkbuttondisplay(serieno);
	
	var pnrli = parseInt(nr,10);
	
	if (pnrli > 1) {
		pnrli--;
		pnrli = String(pnrli);
		if (pnrli.length == 1) pnrli = "0" + pnrli;
		preload_links = new Image();
		var picname_links = document.getElementById("photoname_" + serieno + "-" + pnrli).value;
		preload_links.src = picname_links;
	}

	var maxphoto = document.getElementById("photoserie_" + serieno + "_maxanz").value;
	maxphoto = parseInt(maxphoto,10);
	
	var pnrre = parseInt(nr,10);


	if (pnrre < maxphoto) {
		pnrre++;
		pnrre = String(pnrre);
		if (pnrre.length == 1) pnrre = "0" + pnrre;
		preload_rechts = new Image();
		var picname_rechts = document.getElementById("photoname_" + serieno + "-" + pnrre).value;
		preload_rechts.src = picname_rechts;
	}
	
	
}

function phclose(serieno) {
	document.getElementById('previewbox_' + serieno).style.display = "none";
	document.getElementById('previewbg').style.display = "none";
	document.getElementById("photoserie_" + serieno + "_shown").value = "";
	
	closephotos(serieno);
}

function closephotos(serieno) {
	for (i = 1; i < 99; i++) {
		var ilook = i;
		if (i < 10) ilook = "0" + i;
		if (document.getElementById("photobox_" + serieno + "-" + ilook)) {
			document.getElementById("photobox_" + serieno + "-" + ilook).style.display = "none";
		}
	}	
}

function setopacity(obj,opacity) {
	opacity = (opacity == 100)?99.999:opacity;
	// IE/Win
	obj.style.filter = "alpha(opacity="+opacity+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = opacity/100;
	// Older Mozilla and Firefox
	obj.style.MozOpacity = opacity/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = opacity/100;
}

function fade (objId,opacity,add,speed) {
	if (opacity < 100) {
	opacity = opacity+speed;
	setopacity(document.getElementById(objId),opacity);
	window.setTimeout("fade('" + objId + "'," + opacity + "," + add + "," + speed + ")", 15);
	}
}

function nextphoto (serieno) {
	var presentphoto = document.getElementById("photoserie_" + serieno + "_shown").value;
	var nphoto = parseInt(presentphoto,10);
	nphoto++;
	nphoto = String(nphoto);
	if (nphoto.length == 1) nphoto = "0" + nphoto;
	closephotos(serieno);
	phclick(serieno,nphoto);
}

function previousphoto (serieno) {
	var presentphoto = document.getElementById("photoserie_" + serieno + "_shown").value;
	var nphoto = parseInt(presentphoto,10);
	nphoto--;
	nphoto = String(nphoto);
	if (nphoto.length == 1) nphoto = "0" + nphoto;
	closephotos(serieno);
	phclick(serieno,nphoto);
}

function checkbuttondisplay(serieno) {
	
	document.getElementById("backward_" + serieno).style.visibility = "visible";
	document.getElementById("forward_" + serieno).style.visibility = "visible";
	
	var presentphoto = document.getElementById("photoserie_" + serieno + "_shown").value;
	presentphoto = parseInt(presentphoto,10);
	
	var maxphoto = document.getElementById("photoserie_" + serieno + "_maxanz").value;
	maxphoto = parseInt(maxphoto,10);
	
	if (presentphoto == 1) document.getElementById("backward_" + serieno).style.visibility = "hidden";
	if (presentphoto == maxphoto) document.getElementById("forward_" + serieno).style.visibility = "hidden";
	
}


function getWindowSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  output = new Array(myWidth,myHeight);
  return output;
}

function openpreview() {
	
	var windim = getWindowSize();
	var winheight = windim[1];
	document.getElementById("previewbg").style.height = winheight + "px";
	
	if (document.getElementById("previewbg").style.display != "block") {
		if (navigator.appName.indexOf("Microsoft") == -1) {
			setopacity(document.getElementById("previewbg"),0);
			document.getElementById("previewbg").style.display = "block";
			fade("previewbg",0,10,5);
		} else {
			document.getElementById("previewbg").style.display = "block";	
		}
	}		
}