just some javascript- functions I find myself often using for greasemonkey- scripts

greasemonkey functions

// Some convenience- functions for removing elements

function removeElementByXpath(xpath) {
    return removeElement(getElementByXpath(xpath));
}

function getElementByXpath(xpath) {
  return document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
}

function removeElement(element) {
    return element.parentNode.removeChild(element);
}

function removeElementById(id) {
    return removeElement(document.getElementById(id));
}

function removeElementsByClassName(className) {
    var elements = document.getElementsByClassName(className);
    for(var i in className) {
        removeElement(elements[i]);
    }
}