function popup(which){
	if (which == "intro")oeffnePopup('popup.html','name',800,645,'yes');
	if (which == "konst")oeffnePopup('popup.html','name',490,600,'yes');
	if (which == "material1")oeffnePopup('popup1.html','name',695,476,'no');
	if (which == "material2")oeffnePopup('popup2.html','name',698,468,'no');
	if (which == "material3")oeffnePopup('popup3.html','name',473,699,'no');
	if (which == "patent")oeffnePopup('popup.html','name',355,535,'no');
	if (which == "fertigung1")oeffnePopup('popup1.html','name',653,443,'no');
	if (which == "fertigung2")oeffnePopup('popup2.html','name',656,447,'no');
	if (which == "fertigung3")oeffnePopup('popup3.html','name',654,447,'no');
	if (which == "fertigung4")oeffnePopup('popup4.html','name',446,653,'no');
	if (which == "lampe1")oeffnePopup('popup1.html','name',606,502,'no');
	if (which == "lampe21")oeffnePopup('popup2.html','name',485,508,'no');
	if (which == "lampe22")oeffnePopup('popup3.html','name',476,442,'no');
	if (which == "lampe3")oeffnePopup('popup4.html','name',365,610,'no');
}
var fenster;
function oeffnePopup(datei, ziel, breite, hoehe, scroll){
	intX = screen.availHeight / 2 - (hoehe / 2);
	intY = screen.availWidth / 2 - (breite / 2);
	if (fenster && !fenster.closed)fenster.close();
	fenster=window.open(datei, ziel,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars="+scroll+",resizable=no,width="+breite+",height="+hoehe+",top=" + intX + ",left=" + intY);
	fenster.focus();
};