// BROWSER

var agt = navigator.userAgent.toLowerCase();
var is_major  = parseInt(navigator.appVersion);
    
var is_nav = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
var is_nav6 = (is_nav && (is_major == 5));
var is_ie = (agt.indexOf("msie") != -1) 
var is_opera = (agt.indexOf("opera") != -1);     
var is_ie3 = (is_ie && (is_major < 4));     
var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5")==-1) );     
var is_ie5up = (is_ie  && !is_ie3 && !is_ie4);
   
var	browser = "";
if (is_nav6) {
	browser = "ns";
	version = 6;
}else if (is_opera) {
	browser = "opera";
	version = 5;
}else if (is_nav) {
	browser = "ns";
	version = 4;
}else if ((is_ie3) || (is_ie4) || (is_ie5up)) {
	browser = "ie";
	version = 5;
}else{
	browser = "nn";
	version = 0;
}

// MOUSEOVERFUNKTION FÜR RECHTES MENÜ

function img_ch(imgName, imgSrc)
{
	if ((browser=="ns") && (version<5)) {
		document.layers.rightcolumn.document[imgName].src = imgSrc;
	}else{
		document[imgName].src = imgSrc;
	}
}

// POSITIONING DER SEITENELEMENTE BEIM SCROLLEN

function moveit()
{
	if ((browser=="ns") && (version<5)) {
		document.layers.rightcolumn.top = shouldY;
		document.layers.leftcolumn.top = shouldY+60;
		document.layers.muks.top = shouldY+70;
	}else if ((browser=="ns") && (version>4)) {
		document.getElementById('rightcolumn').style.top = shouldY;
		document.getElementById('leftcolumn').style.top = shouldY+60;
		document.getElementById('muks').style.top = shouldY+70;
	}else{
		document.all.rightcolumn.style.top = shouldY;
		document.all.leftcolumn.style.top = shouldY+60;
		document.all.muks.style.top = shouldY+70;
	}
}

function checkpos()
{
	if ((browser == "ns") || (browser=="opera")) {
		maxX = "window.innerWidth";
		maxY = "window.innerHeight";
		actXPos = "window.pageXOffset";
		actYPos = "window.pageYOffset";
	} else {
		maxX = "document.body.clientWidth";
		maxY = "document.body.clientHeight";
		actXPos = "document.body.scrollLeft";
		actYPos = "document.body.scrollTop";
	}
	var possibleX = eval(maxX);
	var possibleY = eval(maxY);
	var xpos = eval(actXPos);
	var ypos = eval(actYPos);
	
//	shouldY = possibleY-ypos;
	shouldY = ypos;
	moveit();
	setTimeout("checkpos()",10);
}