function einblenden() {
	var d = document.getElementById("umenu");
	var i = document.getElementById("arrow");
	
	if (d.style.display != "block" )
	{
	d.style.display = "block";
	i.src = "images/arrow_.gif";
	}
	else
	{
	d.style.display = "none";
	i.src = "images/arrow.gif";
	}
}

function einblenden_hover() {
	var d = document.getElementById("umenu");
	var i = document.getElementById("arrow");
	
	if (d.style.display != "block")
	{
	d.style.display = "block";
	i.src = "images/arrow_.gif";
	}
}

function popUp (URL)
{
	var width = 520;
	var height = 350;
    var left = (screen.width/2) - (width/2);
	var top = (screen.height/2) - (height/2);
	top -= 100;
	day = new Date();
	id = day.getTime();
	eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=' + width + ',height=' + height + ',left=' + left + ',top=' + top);");
}