javascript if statement

<!DOCTYPE html>
<title>My Example</title>

// Put the button into a variable
  var e = document.getElementById("myForm");
  
  // Wait for user to click the button
  e.addEventListener( "change", function() {
  
    // Put the selected value into a variable
    var myColor = this.color.value;
    
    // The "If" statement. Only display the alert if "Blue" was selected.
    if (myColor == "Blue") {
    
      // Output a message
      document.getElementById("msg").innerHTML = "Just like the sky!";
        
    }
  
  }, false);
});
</script>

<form id="myForm" name="myForm" action="{action page}">
  <label>
    <input type="radio" name="color" value="Blue"> Blue
  </label>
  <label>
    <input type="radio" name="color" value="Red"> Red
  </label>
  <label>
    <input type="radio" name="color" value="Green"> Green
  </label>
</form>