function getAccounts() {
	var accounts = [];
	while (true) {
		for (var i = 0; i < exchanges.length; i++) {
			if (accounts[i] == null) {
				// 创建异步操作
				accounts[i] = exchanges[i].Go("GetAccount");
			}
		}
		var failed = 0;
		for (var i = 0; i < exchanges.length; i++) {
			if (typeof(accounts[i].wait) != "undefined") {