try { 
document.execCommand('BackgroundImageCache', false, true); 
} catch(e) {}
//  小窓を開くjavascript
//  書式例<a href="./window.html" onclick="openwin(this.href, 400, 200, 0, 0, 1, 1, 1, 1, 0); return false;">400x200</a>
function openwin(url, w, h, t, l, s, st, r, m) {
window.open(url, "", "width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",scrollbars=" + s + ",status=" + st + ",resizable=" + r + ",menubar=" + m);
}