IE = ( document.all )? true : false;
NS4 = ( document.layers ) ? true : false;
NS6 = ( navigator.vendor == ("Netscape6") )? true : false;
DOM = ( document.getElementById ) ? true : false;
IEMac = ( ( document.all ) && ( navigator.appVersion.indexOf("Mac") != -1 ) ) ? true : false;
Opera = ( window.opera ) ? true : false;

var agt=navigator.userAgent.toLowerCase();

var speed = 20;	
var speedQuotient = 100 / speed;
var updateInterval = 50;

if( IE ) {
	var square = document.all["square"];
	var zeilenabstand = 21;
	var zeilenstart = 197;
}
if( NS4 ) {
  var square = document.layers["square"];
}
if( DOM ) {
	var square = document.getElementById("square");
	var zeilenabstand = 21;
	var zeilenstart = 192;
	if( IE ) var zeilenstart = 197;
}
if( Opera ) {
	var square = document.getElementById("square");
	var zeilenabstand = 21;
	var zeilenstart = 192;
}