function openSoundWindow () {
//soundWindow = window.open("sound.html", "soundPopup", "width=40,height=40");

	y=100;
	x=250;
	//if (soundWindow) {if (!soundWindow.closed) soundWindow.close()}

// genau mittig:
	//h=screen.availHeight-30;
	//w=screen.availWidth-30;
	//t=(h-y)/2; if (t<0) t=0;
	//l=(w-x)/2; if (l<0) l=0;

//rechts unten:

h=screen.availHeight;
w=screen.availWidth;

rh=(h-496)/2;
rw=(w-917)/2;

t=rh+496-y; if (t<0) t=0;
l=rw+917-x; if (l<0) l=0;

soundWindow = window.open('/dateien/sound.html','sound','width='+x+',height='+y+',left='+l+',top='+t+',scrollbars=no,menu=no,status=no,location=no,toolbar=no');

//soundWindow.focus();

}

c = document.cookie;
//var ca = document.cookie.split(';');
//for(var i=0;i < ca.length;i++) {
//var c = ca[i];
//while (c.charAt(0)==' ') c = c.substring(1,c.length);
//(document.cookie != "popup_open=true")

beginn=c.indexOf("popup_open=true");

//if(beginn == -1) {
if(document.cookie.indexOf("popup_open=true") == -1 && document.cookie.indexOf("popup_closed=true") == -1) {
openSoundWindow();
}