var ns = document.layers ? true : false;
var ie = document.all && !window.opera ? true : false;;    // IEs
var dom = document.getElementById && !ie ? true : false;  // DOM-Browser

var gbloading = "<img src='images/loading.gif' hspace='20' vspace='20' /><br />";

function isie(ver){
	return navigator.appVersion.indexOf('MSIE '+ver+'');
}

function itextnav(id,prefix){
	var ita=$$('.itextnav');
	for(i=0;i<ita.length;i++){
		if(ita[i].id==prefix+id) ita[i].show();
		else ita[i].hide();	
		$('headScene').update($('head_'+prefix+id).innerHTML);
	}
	
	var itn=$$('#itextnavigation > .itnPseudo'); //.getElementsByClassName('itnPseudo','li',document.getElementById("itextnavigation"));
	
	for(ii=0;ii<itn.length;ii++){
		if(itn[ii].id==prefix+'li'+id){
			itn[ii].className='hover itnPseudo';
			itn[ii].onmouseout=function(){
				this.className='hover itnPseudo';
			}
		}
		else{
			itn[ii].className='itnPseudo';
			itn[ii].onmouseout=function(){
				this.removeClassName('hover');
				this.className='itnPseudo';
			}
		}
	}
	
}

function displayImg(img,id,title) {
	gbid = showGrayBox();
	
	new Ajax.Request('ajax/displayImage.php?img='+img+'&id='+id+'&gbid='+gbid,
	{
		method: 'get',
		asynchronous: true,
		evalScript: true,
		onComplete: function(t) {
		   	$('gb_title_'+gbid).innerHTML = title;
			$('gb_text_'+gbid).update(t.responseText);
		   	center('gb_'+gbid);
		},
		// Handle other errors
		onFailure: function(t) {
			alert('Error ' + t.status + ' -- ' + t.statusText);
		}		
	}
	);
}

function changeImg(img,id,gbid) {
	$('img_table_loading').clonePosition('img_table');
	$('img_table_loading').show();
	new Ajax.Request('ajax/displayImage.php?img='+img+'&id='+id+'&gbid='+gbid,
	{
		method: 'get',
		asynchronous: true,
		evalScript: true,
		onComplete: function(t) {
		   	$('img_table_loading').hide();
			$('gb_text_'+gbid).update(t.responseText);
		   	center('gb_'+gbid);
		},
		// Handle other errors
		onFailure: function(t) {
			alert('Error ' + t.status + ' -- ' + t.statusText);
		}		
	}
	);
}

function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}

function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight =  yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

function request(method,url,ziel,postform,loadingani,newserialize){
	if($(loadingani)) $(loadingani).show();
	else loading(); //$(ziel).update("<img src='images/loading_sitemap.gif' />");
	//alert(loadingani);
	if(method=='post' || method=='POST'){
		//alert(postform);
		if(newserialize) var pbody=$(postform).serialize(true);
		var pbody=$(postform).serialize();
	}else var pbody="";
	new Ajax.Request(url, {
		method: method,
		postBody: pbody,
		onSuccess: function(t) {
			$(ziel).update(t.responseText);
			if($(loadingani)) $(loadingani).hide();
			else unloading();
		},
		onFailure: function(t) {
			$(ziel).update('Error ' + t.status + ' -- ' + t.statusText);
			if($(loadingani)) $(loadingani).hide();
			else unloading();
		},
		evalScript: true,
		asynchronous: true
		}
	);
}

function doAjax(method,url,ziel,postform,loadingani,newserialize) {	
	request(method,url,ziel,postform,loadingani,newserialize);
}
var XgetElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};