if(top.frames.length == 0)
{
	// alert("frame aufbauen");
	var cachekill = document.location.search ? '&' + Math.random() : '?' + Math.random();
	document.clear();
	document.open("text/html","replace");
	document.write('<html>'+
		'<head><title>' + document.title + '<\/title><\/head>'+
		'<frameset rows="*,451,*" border="0" frameborder="0">'+
			'<frame name="oben" src="leer.htm" noresize scrolling=no>'+
			'<frameset cols="*,690,*" border="0" frameborder="0">'+
				'<frame name="links" src="leer.htm" noresize scrolling=no>'+
				'<frame name="content" src="' + document.location + cachekill + '" noresize scrolling=no>'+
				'<frame name="rechts" src="leer.htm" noresize scrolling=no>'+
			'<\/frameset>'+
			'<frame name="unten" src="leer.htm" noresize scrolling=no>'+
		'<\/frameset><\/html>');
	document.close();
}


kaestchen1 = new Image();
kaestchen1.src = "../img/kaestchen.gif";
kaestchen2 = new Image();
kaestchen2.src = "../img/blind.gif";

function Wechsel(feldname,ja) {
	document.images[feldname].src = (ja=="1") ? kaestchen1.src : kaestchen2.src;
}


// popup fenster welches in der mitte des bildschirms zentriert,
// und falls zu gross für die entsprechende auflösung angepasst wird.

function FensterAuf(url,width,height,scroll) {
	if(!url) var url = 'bilder1.htm';
	if(!width) var width = '540';
	if(!height) var height = '416';
	if(!scroll) var scroll = 'yes';
	var winl = (screen.width-width)/2 - 4; var wint = (screen.height-height)/2 + 6;
	var popUp = window.open(url,popUp,"width=" + width + ",height=" + height + ",top=" + wint + ",left=" + winl + ",scrollbars=" + scroll + ",menubar=no,location=no,directories=no,resizable=no,status=no");
	popUp.focus();
}


var interval;
function lauf(id_name, amount, direction) {
	if(interval) { clearInterval(interval); }
	interval = setInterval(function() {
		switch(direction) {
		case "right": move_right(); break;
		case "left": move_left(); break;
		case "down": move_down(); break;
		case "up": move_up(); break;
		}
	}, 10);
	function move_right() { document.getElementById(id_name).scrollLeft = document.getElementById(id_name).scrollLeft-amount; }
	function move_left() { document.getElementById(id_name).scrollLeft = document.getElementById(id_name).scrollLeft+amount; }
	function move_down() { document.getElementById(id_name).scrollTop = document.getElementById(id_name).scrollTop+amount; }
	function move_up() { document.getElementById(id_name).scrollTop = document.getElementById(id_name).scrollTop-amount; }
}
lauf_stop = function() { if(interval) { clearInterval(interval); }  }
