var swapper = function(element, params) {
	this.element = element;
	this.params = params;
	this.init();
}
		
swapper.prototype = {
	
	init: function() {
		
		if ( !this.params.id || !this.element ) {
			var imgs = this.element.getElementsByTagName('img');
			for (var i = 0; i < imgs.length; i++) {
				jQuery(imgs[i]).bind("mouseover", this, this.over);
				jQuery(imgs[i]).bind("mouseout", this, this.out);
			}
		}
		else if ( this.params.id ) {
			jQuery('#'+this.params.id).bind("mouseover", this, this.over);
			jQuery('#'+this.params.id).bind("mouseout", this, this.out);
		}
	},
	// switch to new img path with given prefix@params, save old path		
	over: function(obj) {
		obj.data.off = this.src;
		this.src = this.src.substr(0, (this.src.length - 4)).concat(obj.data.params.prefix).concat(this.src.substr((this.src.length - 4), this.src.length));
	},
	// restore old img path
	out: function(obj) {
		this.src = obj.data.off;
	}
		
};
	
jQuery(document).ready(function() {
	
	if (jQuery('#read-on').length > 0) {
	
		jQuery('#read-on').click(function() {
			
			jQuery('#zurueck').removeAttr('onclick', 'history.go(-1); return false;');
			jQuery('#start-content').hide();
			jQuery('#read-on-content').show();
			jQuery('#zurueck').bind('click', backListener);
			return false;
		});
	}
	
	
	var backListener = function() {
		
		jQuery('#zurueck').unbind('click', backListener);
		jQuery('#zurueck').attr('onclick', 'history.go(-1); return false;');
		jQuery('#start-content').show();
		jQuery('#read-on-content').hide();
		
		return false;
	}

});

jQuery(window).load(function() {
	var menu = document.getElementById('ph-menu');
	if (menu)
		new swapper(document.getElementById('ph-menu'), { prefix: '_a', type: 'img' } );
        var foot = document.getElementById('impressum');
	if (foot)
		new swapper(document.getElementById('impressum'), { prefix: '_a', type: 'img' } );
        var back = document.getElementById('zurueck');
	if (back)
		new swapper(document.getElementById('zurueck'), { prefix: '_a', type: 'img' } );
});


function showPic (whichpic) {
	if (document.getElementById || document.all || document.layers) {
		document.getElementById('placeholder').src = whichpic.href;
		if (whichpic.title) {
			document.getElementById('desc').childNodes[0].nodeValue = whichpic.title;
		} else {
			document.getElementById('desc').childNodes[0].nodeValue = whichpic.childNodes[0].nodeValue;
		} return false;
		} else {
	return true;
	}
}

function showImgDescr(id){
	if (document.getElementById || document.all || document.layers) {
		var data = document.getElementById(id).innerHTML;
		var to = document.getElementById("img_descr");
		to.innerHTML = data;
		var start = document.getElementById("start");
		start.style.visibility = "hidden";
		start.style.display = "none";
	}
}
function changeLink(pid){
	if (document.getElementById || document.all || document.layers) {
		var tochange = document.getElementById("popup");
		var newlink = document.getElementById(pid).href;
		tochange.href = newlink;
	}
}
function initScrollLayer() {
	var wndo = new dw_scrollObj('wn', 'lyr1', 't1');
	dw_scrollObj.GeckoTableBugFix('wn'); 
}
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];}
}