function showImage(name, width, height) {
 var url = 'popup.php?p=' + name;
 var info = 'toolbar=0,';
     info += 'location=0,';
     info += 'directories=0,';
     info += 'status=0,';
     info += 'menubar=0,';
     info += 'scrollbars=0,';
     info += 'resizable=0,';
     info += 'width='+width+',';
     info += 'height='+height+'';
 window.open(url, 'null', info);
}