function openwindow(imageName,imageWidth,imageHeight,alt) {
browserH = imageHeight+100;
browserW = imageWidth+60;
newWindow = window.open("","","width=" + browserW + ",height=" + browserH + ",resizable=yes,scrollbars=yes,menubar=no,toolbar=no,location=no,directories=no,status=no");
newWindow.document.open();
newWindow.document.write(''+alt+'');
newWindow.document.write('
');
newWindow.document.write('Close Window
');
newWindow.document.close();
newWindow.focus();
}