每当你想要的按钮被点击时的某种价值。例如：

Just pass some sort of value whenever the button you want is clicked. For instance:

 ob.addEventListener("click",function() {onCl1(1)});
 ob1.addEventListener("click",function() {onCl1(1)});
  var i;   
function onCl1(value){
i += value;
if(i == 2){
//do this
   }
}

因此，基本上一旦这两个按钮被点击，该值将等于2并触发任何你想要的。

So basically once these two buttons are clicked the value will equal 2 and trigger whatever you want.