function klapp(a) 
{
	var divObj = document.getElementById (a);
	var a = divObj.style.display
	if (a=="block")
	{ divObj.style.display = "none";	}
	else
	{ divObj.style.display = "block"; }
}

function expand(a)
{
	var divObj = document.getElementById (a)
	divObj.style.display = "block";
} 

function hide(a)
{
	var divObj = document.getElementById (a)
	divObj.style.display = "none";
}

function newWindow(mypage,myname)
        {
        settings = 'scrollbars=no,toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,copyhistory=no,width=800,height=800,left=20,top=20'
        msgWindow=window.open(mypage,myname,settings);
        msgWindow.focus();
        }  

function roll(tausch_bild_name,neues_bild_name)
	{
	window.document[tausch_bild_name].src = "images/" + neues_bild_name + ".gif";
	}