Example of JS implementing the same page, multiple enter event binding

I am so sleepy that I can't move my head anymore, so I can just use the code. . .

 = function(e) {
 var ev = (typeof event!= 'undefined') ?  : e;
 if( == 13 &&  == "") {// ActiveElement activity event, this event can only be used in the input domain  ("Content 111:" + );
 }else if(==13&& ==''){
  ("Content 222:" + );
 }
};

The above article JS implements the same page and the example of binding multiple enter event is all the content I share with you. I hope you can give you a reference and I hope you can support me more.