function PopUp(url,name,breite,hoehe,scrollbars) {
	var xPos = (screen.availWidth - breite) / 2
	var yPos = (screen.availHeight - hoehe ) / 2

	myWindow = window.open(url,name,"menubar=no,toolbar=no,resizeable=no,scrollbars="+scrollbars+",width="+breite+",height="+hoehe+",screenX="+xPos+",screenY="+yPos+",left="+xPos+",top="+yPos+",screenX="+xPos+",screenY="+yPos+",left="+xPos+",top="+yPos);

	if (myWindow!=null) {
		myWindow.focus();
	}
	else {
		alert('connot open popup. please check your popup-blocker');
	}
}