/**
 * 新着情報画像ポップアップ
 *
 */
function popupImage(url) {
    var w = popupWindow(url, 650, 600, 'popupimage', 'scrollbars=yes,resizable=yes');
    w.onclick = function() { w.close(); } // Firefox ok
    w.document.onclick = function() { w.close(); } // IE ok
}

// ------------------------------------------------------------------

/**
 * ウィンドウポップアップ
 *
 * @param url URL
 * @param width
 * @param height
 * @param window
 * @param optional
 * @return ハンドル
 */
function popupWindow(url, width, height, windowName, optional) {
	var features = 'width=' + width + ',height=' + height;
	if (window.screen.width > width) {
		features += ',left=' + ((window.screen.width - width) / 2);
	}
	if (window.screen.height > height) {
		features += ',top=' + ((window.screen.height - height) / 2);
	}
	if (optional == '') {
		optional = 'scrollbars=yes,resizable=yes';
	}
	features += ',' + optional;
	w = window.open(url, windowName, features);
	w.focus();
	return w;
}