gistfile1.js

// Defines function

Element.prototype.remove = function() {
    this.parentElement.removeChild(this);
}
NodeList.prototype.remove = HTMLCollection.prototype.remove = function() {
    for(var i = 0, len = this.length; i < len; i++) {
        if(this[i] && this[i].parentElement) {
            this[i].parentElement.removeChild(this[i]);
        }
    }
}

// Now you just find the overlay things in the HTML
// and add something like
// document.getElementById("some-element-id").remove();
// or
// document.getElementsByClassName("some-class-name").remove();