function Is() {
	var agent   = navigator.userAgent.toLowerCase();
	this.major  = parseInt(navigator.appVersion);
	this.minor  = parseFloat(navigator.appVersion);
	this.ns     = ((agent.indexOf('mozilla')   != -1) &&
		(agent.indexOf('spoofer')    == -1) &&
		(agent.indexOf('compatible') == -1) &&
		(agent.indexOf('opera')      == -1) &&
		(agent.indexOf('webtv')      == -1));
	this.ns4    = (this.ns && (this.major      ==  4));
	this.ns6    = (this.ns && (this.major      >=  5));
	this.ie     = (agent.indexOf("msie")       != -1);
	this.ie3    = (this.ie && (this.major      <   4));
	this.ie4  	= (this.ie && (this.major >= 4));
	this.ie5    = (this.ie && (this.major      ==  4) &&
		(agent.indexOf("msie 5.0")   != -1));
	this.ieX    = (this.ie && !this.ie3 && !this.ie4);
}


var is = new Is();
	
	function layerObject(id,left,top) {
		if (is.ie5||is.ns6){
		this.obj = document.getElementById(id).style;
		this.obj.left = left;
		this.obj.top = top;
		return this.obj;
		} else if(is.ie4) {
		this.obj = document.all[id].style;
		this.obj.left = left;
		this.obj.top = top;
		return this.obj;
		} else if(is.ns4) {
		this.obj = document.layers[id];
		this.obj.left = left;
		this.obj.top = top;
		return this.obj;
		}  
}


function verstecken(id) {
			if(document.getElementById) {  //W3C
				document.getElementById(id).style.visibility="hidden";
				}
			else if (document.layers) {     //Netscape 4
				document.layers[id].visibility="hidden";
				}
			else if(document.all) {         //IE 4/5
				document.all[id].visibility="hidden";
				}
			}
		function zeigen(id) {
			if(document.getElementById) {  //W3C
				document.getElementById(id).style.visibility="visible";
				}
			else if (document.layers) {     //Netscape 4
				document.layers[id].visibility="show";
				}
			else if(document.all) {         //IE 4/5
				document.all[id].visibility="visible";
				}
}

function NewWindow(mypage, myname, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}