var lastobject="";

// funktionen, um die menus aus- und einzuklappen
function visible(object,state){
	var status
	if (state)
		status = "visible";
	else
		status = "hidden";
		
    if (document.getElementById)
			document.getElementById(object).style.visibility = status;
}

function ShowMenu(objName){
    if (lastobject == objName){
	visible(objName,false)
	lastobject = "";
	} 
	else
	{
	   if (lastobject != ""){
	   visible(objName,false)
	    }
	   visible(objName,true);
	   lastobject = objName;
	}
}

// funktion, für ddl für onchange event
function visi(pid)
{
	blocking(document.getElementById('showRef').value);
	document.getElementById(pid).style.visibility = 'visible';
	document.getElementById(pid).style.display = 'block';
	document.getElementById('showRef').value = pid;
}
// funktion, für textbereich ein- und auszublenden
function blocking(bid)
{
	document.getElementById(bid).style.visibility = 'hidden';
	document.getElementById(bid).style.display = 'none';
}