function OpenWindow(path, windowname, width, height)
        {
                var filepath, windowname, width, height;
                var x, y

                filepath = path;
                windowname = windowname;
                width = width;
                height = height;

                x = (640 - width)/2, y = (480-height)/2;
                if (screen) {
                        y = (screen.availHeight - height)/2;
                        x = (screen.availWidth - width)/2;
                }

                window.open(filepath, windowname, 'width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x+',menubar=no, scrollbars=yes,resizable=');
        }