function imageWindow(title, src, width, height, alt) {
center_x = Math.round((window.screen.availWidth - width) / 2);
center_y = Math.round((window.screen.availHeight - height) / 2);
var html = "";
html += "" + title + "";
html += "![\""](\"")
";
html += "";
var popup = window.open("", "img", "scrollbars=no, width=" + width + ", height=" + height + ", top=" + center_y + ", left=" + center_x);
popup.document.open();
popup.document.write(html);
popup.document.close();
popup.focus();
}