/***
*
*	PicLoad - optimieren
*
***/
var xmlhttp
var myXMLdata = null;
var myXMLcontent = null;
var myRoot = null;
var ISwriteing = false;
var katalog = new Array();
var ausstellungen = new Array(); 
var klassen = new Array(); 
var kuenstler = new Array(); kuenstler.maxID = 0;

//*************************************************************************************************

function getDomAdapter() {
	var adapter = '';
	if ('undefined' != typeof ActiveXObject) {
		adapter = 'MS';
	} else if ('undefined' != typeof document
		&& document.implementation
		&& document.implementation.createDocument
		&& 'undefined' != typeof DOMParser)
		{adapter = 'default';}
		
	switch (adapter) {
		case 'MS':
			return new (function () {
				this.createDocument = function () {
					var names = ["Msxml2.DOMDocument.6.0",
						"Msxml2.DOMDocument.3.0", "MSXML2.DOMDocument",
						"MSXML.DOMDocument", "Microsoft.XMLDOM"];
					for (var key in names) {
						try { return new ActiveXObject(names[key]); } catch (e) {}
					}
					throw new Error('Unable to create DOMDocument');
				};
				this.parseXml = function (xml) {
					var doc = this.createDocument();
					if (!doc.loadXML(xml)) {
						alert( doc.parseError.reason );
						throw new Error('Parse error');}
					return doc;
				};
			})();
		case 'default':
			return new (function () {
				this.createDocument = function () {
					return document.implementation.createDocument("", "", null);
				};
				this.parseXml = function (xml) {
					var doc = new DOMParser().parseFromString(xml, "text/xml");
					if ("parsererror" == doc.documentElement.nodeName) {
						throw new Error('Parse error'); }
					for (var i=0;i<doc.documentElement.childNodes.length;i++) {
						var _o = doc.documentElement.childNodes[i];
						if (_o.nodeType == 3) {
							doc.documentElement.removeChild( _o );
						}
					}
					return doc;
				};
			})();
		default:
			throw new Error('Unable to select the DOM adapter');
	}
};

//*************************************************************************************************

function checkReadyState( o ) {
	// if xmlhttp shows "loaded"
	if (o.readyState==4) {
		// if "OK"
		if (o.status==200) {
			return true;
		} else {
			alert("Problem retrieving XML data\n"+o.statusText )
		}
	}
}

//*************************************************************************************************

function loadPic( url, _udf ) {
	var bild = document.createElement( "img" );
	
	function onPicload() {
		var fakt1 = (bild.width>500)?(bild.width/500):(1);
		var fakt2 = (bild.height>450)?(bild.height/450):(1);
		var fakt = (fakt1>fakt2)?(fakt1):(fakt2);
		bild.width = bild.width/fakt;
		bild.height = bild.height/fakt;
		bild.style.position = "absolute";
		bild.style.top = ((450-bild.height)/2);
		bild.style.left = ((500-bild.width)/2);
		if( _udf!=null ) { _udf() }
	}
	function onPicerror() {
		bild.width = bild.width;
		bild.height = bild.height;
		bild.style.position = "absolute";
		bild.style.top = ((450-bild.height)/2);
		bild.style.left = ((500-bild.width)/2);
	}

	if (url!=null)
		bild.src = "ggGetPic.php?name="+url+"&time="+new Date().toGMTString();
	else
		bild.src = "nopic.jpg";
	bild.onload = onPicload;
	bild.onerror = onPicerror;
	return bild;
}

function killPic( url ) {
	var o = new Image();
	o.src = "ggKillPic.php?name="+url;
	delete o;
}
//*************************************************************************************************

var _waiterI = 0;
function _waiter(url,_send) { window.clearInterval( _waiterI );writeXMLDoc(url,_send)}
function _writeResponse() { if(checkReadyState(xmlhttp)) { ISwriteing=false } }
function writeXMLDoc(url,_send) {
	if (ISwriteing) { 
		_waiterI = window.setInterval( "_waiter('"+url+"','"+_send+"')", 1000 );
		return
	};
	
	ISwriteing = true;
	xmlhttp=null;
	var XMLsend = new ActiveXObject("Msxml2.DOMDocument.3.0");
	XMLsend.loadXML( (_send!="data")?(myXMLcontent.xml):(myXMLdata.xml) );
	if ( XMLsend.parseError != 0 ) { alert( XMLsend.parseError.reason ); return false }

	// code for Mozilla, etc.
	if (window.XMLHttpRequest) { 
		xmlhttp=new XMLHttpRequest()
	// code for IE
	} else if (window.ActiveXObject) {
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
	}

	if (xmlhttp!=null) {
		xmlhttp.onreadystatechange=_writeResponse;
		cc = (_send!="data")?("myXML"):("myDAT");
		cc += "="+escape(XMLsend.xml);
		xmlhttp.open("POST","ggBack.php",true);
		xmlhttp.setRequestHeader( "Content-Type", "application/x-www-form-urlencoded; charset=ISO-8859-1" );
		xmlhttp.setRequestHeader( "Cache-Control", "no-cache" );
		xmlhttp.setRequestHeader( "If-Modified-Since", "Wed, 31 Dec 1980 00:00:00 GMT"); 
		xmlhttp.setRequestHeader("Expires", "Wed, 31 Dec 1980 00:00:00 GMT"); 

		xmlhttp.send( cc );
	} else {
		alert("Your browser does not support XMLHTTP.")
	 }
}

//*************************************************************************************************

function loadXMLDoc(url, myResponse ) {
	xmlhttp=null;
	
	// code for Mozilla, etc.
	if (window.XMLHttpRequest) { 
		xmlhttp=new XMLHttpRequest()

	// code for IE
	} else if (window.ActiveXObject) {
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
	}

	if (xmlhttp!=null) {
		xmlhttp.onreadystatechange=(myResponse==null)?(onXMLContent):(myResponse);
		xmlhttp.open("GET",url,true);
		xmlhttp.setRequestHeader( "Cache-Control", "no-cache" );
		xmlhttp.setRequestHeader("If-Modified-Since", "Wed, 31 Dec 1980 00:00:00 GMT"); 
		xmlhttp.setRequestHeader("Expires", "Wed, 31 Dec 1980 00:00:00 GMT"); 
		xmlhttp.setRequestHeader('Content-Type', 'text/xml' );
		xmlhttp.send( null );
	} else {
		alert("Your browser does not support XMLHTTP.")
	 }
}

function onXMLDatas() {
	if(checkReadyState(xmlhttp)) {

	myXMLdata = xmlhttp.responseXML;
	if( !myXMLdata.parseError ) { myXMLdata.parseError=0 }
	if( myXMLdata.parseError != 0 ) { alert( myXMLdata.parseError.reason ); return }
	var response = myXMLdata.documentElement;
    myData = response;

	var y = response.firstChild; var eox = false;
	while (!eox) {

		// künstler lesen	
		if (y.nodeName == "kuenstlers") {
			var z = y.getElementsByTagName("kuenstler");
			for (var i=0;i<z.length;i++) {
				var tmp = new Array();
				var cID = z[i].getAttribute( "id" );
				try {
					 tmp.name = z[i].getElementsByTagName( "name" )[0].firstChild.data;
				} catch (e) { tmp.name = "N/N" };
				try {
					tmp.text = z[i].getElementsByTagName( "text" )[0].firstChild.data;
					(tmp.text==undefined)?(tmp.text=""):("");
				} catch (e) { tmp.text = "" };
				
				tmp.XMLpos = i;
				kuenstler[cID] = tmp;
				if (cID>kuenstler.maxID) kuenstler.maxID=cID;
			}
		}
		// Nächstes Node lesen oder abbrechen
		if (y==response.lastChild) {eox = true} else {y = y.nextSibling}
	}

	// Produktdaten lesen
	myFiller();
	loadXMLDoc('gg1.xml');
	}
}

function onXMLContent() {
	if(checkReadyState(xmlhttp)) {
	myXMLcontent = getDomAdapter().parseXml( xmlhttp.responseText );

	if( !myXMLcontent.parseError ) { myXMLcontent.parseError=0 }
	if( myXMLcontent.parseError != 0 ) {alert( myXMLcontent.parseError.reason ); return};

	var response = myXMLcontent.documentElement;
    myRoot = response;

	// Produktgruppen abgehen
	var y = response.firstChild; var eox = false;
	while (!eox) {
		var tmp = new Array();

		// Katalog oder Ausstellung
		if (y.nodeName != "Ausstellung") {
			klassen.push( y.nodeName );
		} else {
			var tmp1 = new Object();
			tmp1.id = y.getAttribute( "id" );
			tmp1.name = y.getElementsByTagName( "name" )[0].childNodes[0].nodeValue;
			tmp1.von = y.getElementsByTagName( "von" )[0].childNodes[0].nodeValue;
			tmp1.bis = y.getElementsByTagName( "bis" )[0].childNodes[0].nodeValue;
			ausstellungen.push( tmp1 );
		}

		// Produkte lesen
		var z = y.getElementsByTagName("produkt");
		tmp.maxID = 1000*(katalog.length<=8)?(katalog.length):(katalog.length+4);
		for (var i=0;i<z.length;i++) {
			var tmp1 = new Array();
			tmp1.id = z[i].getAttribute( "id" );
			try {
				 tmp1.name = z[i].getElementsByTagName( "name" )[0].firstChild.data;
			} catch (e) {};
			try {
				tmp1.kuenstler = z[i].getElementsByTagName( "kuenstler" )[0].firstChild.data;
			} catch (e) {};
			try {
				tmp1.short = (z[i].getElementsByTagName( "short" ).length > 0);
			} catch (e) { tmp1.short = false };
			try {
				tmp1.text = z[i].getElementsByTagName( "text" )[0].firstChild.data;
				(tmp1.text==undefined)?(tmp1.text=""):("");
			} catch (e) { tmp1.text = "" };
			try {
				tmp1.bild = z[i].getElementsByTagName( "bild" )[0].firstChild.data;
			} catch (e) { tmp1.bild = "pic/nopic.jpg" };
			tmp.push( tmp1 );
			if (tmp1.id>tmp.maxID) tmp.maxID=tmp1.id;
		}

		// Nächstes Node lesen oder abbrechen
		if (y==response.lastChild) {eox = true} else {y = y.nextSibling}

		katalog.push( tmp );
	}
	
	myControler();
	myShower();
	}
}