打开：

var MyWaiting = !msg ? "加载中...." : msg;
		plus.nativeUI.showWaiting(MyWaiting);
		plus.webview.currentWebview().setStyle({
			mask: "rgba(0,0,0,0.5)"
		});

plus.nativeUI.closeWaiting();
		plus.webview.currentWebview().setStyle({
			mask: "none"
		});