var isNav = true;
  var IE4 = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;		// true if we're on ie
  var isWin = (navigator.appVersion.indexOf("Windows") != -1) ? true : false; // true if we're on windows
  var NS4 =  (document.layers)? true : false;
  var NS6 = parseInt(navigator.appVersion)==5 ? true : false;
  if (IE4){
	isNav = false;
  } 
 
  var xsize = 780; //hier die Breite des neuen Fensters
  if (screen.height <= 700){
  var ysize = 600; //hier die Hoehe des neuen Fensters
  } else {
  var ysize = 780;
  }

  ScreenWidth = screen.width;
  ScreenHeight = screen.height;
  xpos = (ScreenWidth/2)-(xsize/2);
  ypos = (ScreenHeight/2)-(ysize/2);
  ver4 = (IE4||NS4);
  ver4b = (ver4||NS6);
  
    if (ver4b!=true){  
    function OpenIt(xsize, ysize){
        alert('Bitte installieren Sie einen Browser mit Support von Javascript 1.2. Diese WebSite funktioniert beispielsweise mit dem Internet Explorer oder Netscapes Navigator in den Versionen 4.x oder neuer!')
        self.history.back();
        }
    }
  
  if (ver4b==true){
    function OpenIt(){
        if (NS4){
            window.moveTo(xpos,ypos);
	 	if (screen.height <= 700){
  		window.resizeTo(786,600);
  		} else {
  		window.resizeTo(786,760);
		window.focus()
		window.resizeTo(786,760);
		} 
            }
    
        if (IE4){
            window.moveTo(xpos,ypos);
            if (screen.height <= 700){
  		window.resizeTo(786,600);
  		} else {
  		window.resizeTo(786,760);
		} 
            }
      }
}
function OpenIt2(az, bz){
                window.moveTo(xpos,ypos);
	 	window.resizeTo(az,bz);
}