The this keyword and it's exexcution context

Am I correct that the this key word in the deleteTask function points to the
bindCompleteItems function in the code below. So the this key word execution context is the
bindCompleteItems object? That means that this in this.parentNode in the deleteTask function refers
to the deletebutton. I understand that the this keyword refers to an object, that object which is
executing the current javascript code.

You have not posted any code for us to review.