function switchLayer(obj) 
{
	var el = document.getElementById(obj);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
	}
}

function displayLayer(obj)
{
	var el = document.getElementById(obj);
	el.style.display = '';
}

function unDisplayLayer(obj)
{
	var el = document.getElementById(obj);
	el.style.display = 'none';
}

function switchVisibility(obj) 
{	
	var el = document.getElementById(obj);
	
	alert(el.style.visibility);
	if ( el.style.visibility != "hidden" ) {
		el.style.visibility = 'hidden';
	}
	else {
		el.style.visibility = 'visible';
	}
}

function showLayer(obj) 
{	
	var el = document.getElementById(obj);
	el.style.visibility = 'visible';
}

function hideLayer(obj) 
{	
	var el = document.getElementById(obj);
	el.style.visibility = 'hidden';
}

function Loader()
{
	switchLayer("flug");
	switchLayer("mietwagen");
	switchLayer("lami");
}