var alphawert = 100;
var alphawert_moz = 100;
var alphawert_nachher = 0;
var alphawert_moz_nachher = 0;

function galerie_in(kategorie,bild) {

	//Für Kategorie "Vorher-Nachher" spezielle Behandlung
	if(kategorie=='vorher_nachher') {
		
		var trennPos_a = bild.src.indexOf("thumbs/");
		var vorher_bild = bild.src.substr(trennPos_a + 7);
		
		var trennPos_data = vorher_bild.indexOf(".");
		var vorher_bild_data = vorher_bild.substr(trennPos_data+1);
		
		var trennPos_b = vorher_bild.indexOf("-");
		var vorher_bild = vorher_bild.substr(0,trennPos_b);
		
		document.getElementById('showroom_vorher').src = "images/galerie/" + kategorie + "/" + vorher_bild + "- vorher." + vorher_bild_data;
		
		document.getElementById('galerie_show_vorher').style.visibility = "visible";
		document.getElementById('showroom_vorher').style.visibility = "visible";
		document.getElementById('showroom').style.visibility = "visible";
		document.getElementById("showroom_vorher").style.filter = "Alpha(opacity=0)";
		document.getElementById("showroom_vorher").style.MozOpacity = 0.0;
		document.getElementById("showroom").style.filter = "Alpha(opacity=0)";
		document.getElementById("showroom").style.MozOpacity = 0.0;
		alphawert = 100;
		alphawert_nachher = 0;
	}
	
	bild.style.filter = "Alpha(opacity=100)"; 
	bild.style.MozOpacity=1.0;
	
	var trennPos = bild.src.indexOf("thumbs/");
	var grosses_bild = bild.src.substr(trennPos + 7);
	
	document.getElementById('showroom').src = "images/galerie/" + kategorie + "/" + grosses_bild;
	
	//Dazugehörige Quelle ausgeben
	//if(typeof copyrights[kategorie + "/" + grosses_bild] != "undefined") {

	var i,j;
	var found = 0, found_i = 0, found_j = 0;

	for (i = 0; i < copyrights_array.length; i++) {
	for (j = 0; j < copyrights_array[i].length; j++) {
	    if (copyrights_array[i][j] == kategorie + "/" + grosses_bild) {
		 found = 1;
      	 found_i = i;
      	 found_j = j;
	  }
	}
	}

	if(found) {
		if(kategorie=='vorher_nachher') {		
			document.getElementById("galerie_quelle_vorher").style.visibility = "visible";
			document.getElementById("galerie_quelle_vorher").innerHTML = "<i>&copy; " + fotografen[found_i] + "</i>";
		} else {
		document.getElementById("galerie_quelle").style.visibility = "visible";
		document.getElementById("galerie_quelle").innerHTML = "<i>&copy; " + fotografen[found_i] + "</i>";
		}
	
	} else {
		document.getElementById("galerie_quelle").style.visibility = "hidden";
		document.getElementById("galerie_quelle").innerHTML = "";
		if(kategorie=='vorher_nachher') {		
			document.getElementById("galerie_quelle_vorher").style.visibility = "hidden";
			document.getElementById("galerie_quelle_vorher").innerHTML = "";
		}
	}
	
	//Für Kategorie "Vorher-Nachher" spezielle Behandlung
	if(kategorie=='vorher_nachher') {		
		init_fade();
	}
}

function galerie_out(bild) {

	bild.style.filter = "Alpha(opacity=40)"; 
	bild.style.MozOpacity=0.4;
	
}


function init_fade() {

	document.getElementById("showroom_vorher").style.filter = "Alpha(opacity=100)";
	document.getElementById("showroom_vorher").style.MozOpacity = 1.0;
	document.getElementById("showroom").style.filter = "Alpha(opacity=0)";
	document.getElementById("showroom").style.MozOpacity = 0.0;
	
	//document.getElementById("galerie_echo").innerHTML = alphawert;
	
	setTimeout("fade2nachher(100,0);",3000);
}

function fade2nachher(alphawert,alphawert_nachher) {
	
	if(alphawert > 0) {
		
		var Browser = navigator.userAgent.search(/Firefox.+/);
		if (Browser != -1) { fading = 4; }
		else {fading = 4;}
		
		alphawert = alphawert - fading;
		alphawert_nachher = alphawert_nachher + fading;
		
		alphawert_moz = alphawert * 0.01;
		alphawert_nachher_moz = alphawert_nachher * 0.01;
		
		document.getElementById("showroom_vorher").style.filter = "Alpha(opacity=" + alphawert + ")";
		document.getElementById("showroom_vorher").style.MozOpacity = alphawert_moz;
		document.getElementById("showroom").style.filter = "Alpha(opacity=" + alphawert_nachher + ")";
		document.getElementById("showroom").style.MozOpacity = alphawert_nachher_moz;

		//document.getElementById("galerie_echo").innerHTML = alphawert;
		
		if (Browser != -1) { intervalle = 10; }
		else {intervalle = 10;}
		
		setTimeout("fade2nachher("+alphawert+","+alphawert_nachher+");",intervalle);		
	}
	
}


function show_info(layer_id) {
	
	document.getElementById(layer_id).style.visibility = "visible";

}

function hide_info(layer_id) {

	document.getElementById(layer_id).style.visibility = "hidden";	

}