go == true ? setTimeout(goto, 1) : void(0);

楼主试试：
```
var i = 0;
function a (param) {
param = param || 0;
console.log("a" + param);
if (i < 3) {
a(1);
i++;
}
console.log("a() executing finished.");
}
```
和
```
var i = 0;
function a (param) {
param = param || 0;
console.log("a" + param);
if (i < 3) {
setTimeout(a.bind(0, i), 1);
i++;
}
console.log("a() executing finished.");
}
```