function addEngine(name, ext, spname, cat) {
	base = "http://kkfox.in2000.us/sp/";
	_do_addEngine(base+name+".src", base+name+"."+ext, spname, cat);
}
function _do_addEngine(src, img, desc, cat) {
	if ((typeof window.sidebar == "object") && (typeof window.sidebar.addSearchEngine == "function")) {
		window.sidebar.addSearchEngine(src, img, desc, cat);
	} else {
		alert("您必須使用 Firefox 才能安裝這些搜尋模組");
	}
}