allStyles += introClass
    var style = document.createElement('style')
    style.textContent = allStyles
    document.body.appendChild(style)
  }


  function addCurStyles() {

    var curClass = getCurClass()
    var nodes = Array.prototype.slice.call(document.querySelectorAll('img'))
    nodes = nodes.concat(Array.prototype.slice.call(document.querySelectorAll('div')))
    nodes = nodes.concat(Array.prototype.slice.call(document.querySelectorAll('span')))
    nodes = nodes.concat(Array.prototype.slice.ca