#### Close iFrame Listener

```
// ENABLE SPAWNED IFRAME WINDOW TO CLOSE ITSELF
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";
window.eventer = window[eventMethod];

// CLOSE IFRAME WINDOW LOGIC
eventer(messageEvent, function (e) {
  if (e.origin && typeof e.data!='undefined' && typeof e.data.message!='undefined') {
    switch(e.data.message){
      case 'close':  // CLOSE IFRAME WINDOW COMMAND
      break;
    }
  }
}, false);