function openPictureWindow(imageName,alt,imageWidth,imageHeight,posLeft,posTop) {
if (typeof(alt)=='undefined') alt="© Philips Symfonie Orkest";
if (typeof(imageWidth)=='undefined' || imageWidth=='') imageWidth=800;
if (typeof(imageHeight)=='undefined' || imageHeight=='') imageHeight=600;
if (typeof(posTop)=='undefined' || posTop=='') posTop=(screen.height-imageHeight-20)/2;
if (typeof(posLeft)=='undefined' || posLeft=='') posLeft=(screen.width-imageWidth)/2;
newWindow = window.open("","Imagedetail","width="+imageWidth+",height="+imageHeight+",left="+posLeft+",top="+posTop);
newWindow.document.open();
newWindow.document.write(''+alt+'');
newWindow.document.write('
');
newWindow.document.write('');
newWindow.document.close();
newWindow.focus();
};