// the BridgeTalk Object
var bt = new BridgeTalk();
// the communication target
bt.target = "photoshop";
// The script to be executed as a String
var message = "alert('Hello Photoshop')";
// assign to the object's body the message
bt.body = message;
// send the message to the target app
bt.send(); // an alert will pop-up in Photoshop