function slide(source, eins, zwei)
{
	if(source.className==eins)
	{
		source.className = zwei;
	}
	else
	{
		source.className=eins;
	}		  
}
function headchange(source)
{
	elem = document.getElementById(source.className);
	if(elem.className=="invisible")
	{
		elem.className="visible";
	}
	else
	{
		elem.className="invisible";
	}  
}
function FensterOeffnen(Adresse, Width, Height) {
	MeinFenster = window.open(Adresse, "Zweitfenster", "height="+Height+", width="+Width, "left=100, top=200");
	MeinFenster.focus();
}
function classChange(elementId, newClass){
	document.getElementById(elementId).className=newClass;
}
function changePic(Source){
var x = Source.className;
Source.className = Source.src;
Source.src = x;
}