function openPictWindow(imageName,imageWidth,imageHeight,alt,description) {
var newimageHeight;
var newleft;
var newtop;
newimageHeight=eval(imageHeight)+40;
newleft = eval((screen.availWidth-imageWidth)/2)
newtop = eval((screen.availHeight-newimageHeight)/2)
newWindow = window.open("","newWindow","width="+imageWidth+",height="+newimageHeight+",left="+newleft+",top="+newtop);
newWindow.document.open();
newWindow.document.write(''+alt+'');
newWindow.document.write('');
newWindow.document.write('
');
newWindow.document.write('
'+description+'');
newWindow.document.write('
Sluit dit venster');
newWindow.document.write('');
newWindow.document.close();
newWindow.focus();
}