mui 如何判断网络是否连接，html5+断网提示

mui.plusReady(function() {
	document.addEventListener("netchange", wainshow, false);
});

function wainshow() {
	if (plus.networkinfo.getCurrentType() == plus.networkinfo.CONNECTION_NONE) {
		mui.toast("网络异常，请检查网络设置！");
	}
}