function kasten(id1,id2,inhalt1,inhalt2){
	if(document.getElementById(id1).style.display=="none"){
		document.getElementById(id1).style.display="";
		document.getElementById(id2).innerHTML = inhalt1;
	} else {
		document.getElementById(id1).style.display="none";
		document.getElementById(id2).innerHTML = inhalt2;
	}
	return true;
}

//Contents for menu 1
var menu1=new Array()
menu1[0]='<div class=headin><a href="index.php?id=quellen"><u>Quellen</u></a>'
menu1[1]='<a href="index.php?id=geruchsproblematik">&nbsp;Geruchsproblematik</a>'
menu1[2]='<a href="index.php?id=ursachen"><u>Ursachen</u></a>'

//Contents for menu 2, and so on
var menu2=new Array()
menu2[0]='<div class=headin><a href="index.php?id=auftreten"><u>Auftreten</u></a><div class="headinhr"></div>'
menu2[1]='<a href="index.php?id=auswirkung"><u>Auswirkung</u></a>'
menu2[2]='<a href="index.php?id=giftigkeit">&nbsp;Giftigkeit</a>'
menu2[3]='<a href="index.php?id=korrosion">&nbsp;Korrosion</a></div>'

//Contents for menu 3, and so on
var menu3=new Array()
menu3[0]='<div class=headin><a href="index.php?id=desulfurikationunterbindung">Unterbindung der Desulfurikation</a><div class="headinhr"></div>'
menu3[1]='<a href="index.php?id=umwandlung">Umwandlung der Sulfide im Abwasser</a><div class="headinhr"></div>'
menu3[2]='<a href="index.php?id=symptone">Behandlung der Symptome</a></div>'

//Contents for menu 4, and so on
var menu4=new Array()
menu4[0]='<div class=headin><a href="index.php?id=ablagerungen">Beseitigung von Ablagerungen</a><div class="headinhr"></div>'
menu4[1]='<a href="index.php?id=oxidationsmittel">Oxidationsmittel</a><div class="headinhr"></div>'
menu4[2]='<a href="index.php?id=faellungsmittel">Fällungsmittel</a><div class="headinhr"></div>'
menu4[3]='<a href="index.php?id=wasserwerk">Wasserwerks-<br />rückstände</a><div class="headinhr"></div>'
menu4[4]='<a href="index.php?id=alkanisierung">Alkalisierungsmittel</a><div class="headinhr"></div>'
menu4[5]='<a href="index.php?id=Ca(NO3)2">Ca(NO<sub>3</sub>)<sub>2</sub></a><div class="headinhr"></div>'
menu4[6]='<a href="index.php?id=biofilter">Biofilter</a></div>'

//Contents for menu 5, and so on
var menu5=new Array()
menu5[0]='<div class=headin><u>Entstehung des Lebens</u><br /><a href="index.php?id=biofilmtheorie">&nbsp;Die Bioflimtheorie</a>'
menu5[1]='<a href="index.php?id=posidonienschiefer">&nbsp;Posidonienschiefer</a>'
menu5[2]='<div class="headinhr"></div><u>Chemische Grundlagen</u><br /><a href="index.php?id=allgemein">&nbsp;Allgemein</a>'
menu5[3]='<a href="index.php?id=herstellungschwefelsaeure">&nbsp;Herstellung von &nbsp;Schwefelsäure</a>'
menu5[4]='<a href="index.php?id=periodensystem">&nbsp;Das Periodensystem</a>'
menu5[5]='<a href="index.php?id=gefahrensymbole">&nbsp;Die Gefahrensymbole</a></div>'

//Contents for menu 6, and so on
var menu6=new Array()
menu6[0]='<div class=headin><a href="index.php?id=medien">Medien</a><div class="headinhr"></div>'
menu6[1]='<a href="index.php?id=links">Links</a></div>'
	
var menuwidth='165px' //default menu width
var menubgcolor='#760109'  //menu bgcolor
var disappeardelay=250  //menu disappear speed onMouseout (in miliseconds)
var hidemenu_onclick="yes" //hide menu when user clicks within menu?

/////No further editting needed

var ie4=document.all
var ns6=document.getElementById&&!document.all

if (ie4||ns6)
document.write('<div id="dropmenudiv" style="visibility:hidden;width:'+menuwidth+';background-color:'+menubgcolor+'" onMouseover="clearhidemenu()" onMouseout="dynamichide(event)"></div>')

function getposOffset(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}


function showhide(obj, e, visible, hidden, menuwidth){
if (ie4||ns6)
dropmenuobj.style.left=dropmenuobj.style.top=-500
if (menuwidth!=""){
dropmenuobj.widthobj=dropmenuobj.style
dropmenuobj.widthobj.width=menuwidth
}
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
obj.visibility=visible
else if (e.type=="click")
obj.visibility=hidden
}

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function clearbrowseredge(obj, whichedge){
var edgeoffset=0
if (whichedge=="rightedge"){
var windowedge=ie4 && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure-obj.offsetWidth
}
else{
var windowedge=ie4 && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure+obj.offsetHeight
}
return edgeoffset
}

function populatemenu(what){
if (ie4||ns6)
dropmenuobj.innerHTML=what.join("")
}


function dropdownmenu(obj, e, menucontents, menuwidth){
if (window.event) event.cancelBubble=true
else if (e.stopPropagation) e.stopPropagation()
clearhidemenu()
dropmenuobj=document.getElementById? document.getElementById("dropmenudiv") : dropmenudiv
populatemenu(menucontents)

if (ie4||ns6){
showhide(dropmenuobj.style, e, "visible", "hidden", menuwidth)
dropmenuobj.x=getposOffset(obj, "left")
dropmenuobj.y=getposOffset(obj, "top")
dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px"
dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px"
}

return clickreturnvalue()
}

function clickreturnvalue(){
if (ie4||ns6) return false
else return true
}

function contains_ns6(a, b) {
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
}

function dynamichide(e){
if (ie4&&!dropmenuobj.contains(e.toElement))
delayhidemenu()
else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
delayhidemenu()
}

function hidemenu(e){
if (typeof dropmenuobj!="undefined"){
if (ie4||ns6)
dropmenuobj.style.visibility="hidden"
}
}

function delayhidemenu(){
if (ie4||ns6)
delayhide=setTimeout("hidemenu()",disappeardelay)
}

function clearhidemenu(){
if (typeof delayhide!="undefined")
clearTimeout(delayhide)
}

if (hidemenu_onclick=="yes")
document.onclick=hidemenu