Remove elements from a page by clicking on them.

removeElements.js

(function() {
  var d = document;
  d.styleSheets[0].addRule('.h7374',
			   'background:red !important');
  var escape = function(e) {
    if (e.keyCode==27)
      cancel();
  },

  getElements = function() {
    return d.body.getElementsByTagName('*');
  },

  highlight = function(e) {
    if (this.classList)
      this.classList.add('h7374');
    e.stopPropagation();
    return false;
  },

  removeHighlight = function(e) {
    if (this.classList)
      this.classList.remove('h7374');
    e.stopPropagation();
    return false;
  },

  removeElement = function(e) {
    var rightClick;
    if (e.which) rightClick = (e.which == 3);
    else if (e.button) rightClick = (e.button == 2);
    if (rightClick)
      cancel();
    else
      this.parentNode.removeChild(this);
    e.preventDefault();
    e.stopPropagation();
    return false;
  },

  maybeCancel = function(e) {
    var rightClick;
    if (e.which) rightClick = (e.which == 3);
    else if (e.button) rightClick = (e.button == 2);
    if (rightClick)
      cancel();
    e.preventDefault();
    e.stopPropagation();
    return false;
  },

  cancel = function() {
    var i = 0,
    o = d,
    els = getElements();
    while (o = els.item(i++)) {
      if (o.classList)
	o.classList.remove('h7374');
      o.removeEventListener('mouseover', highlight);
      o.removeEventListener('mouseout', removeHighlight);
      o.removeEventListener('mousedown', maybeCancel);
      o.removeEventListener('mouseup', removeElement);
    }
    d.removeEventListener('keydown', escape);
  },

  i = 0,
  o,
  els = getElements();
  while(o = els.item(i++)) {
    o.addEventListener('mouseover', highlight);
    o.addEventListener('mouseout', removeHighlight);
    o.addEventListener('mousedown', maybeCancel);
    o.addEventListener('mouseup', removeElement);
  }
  d.addEventListener('keydown', escape);
})()

removeElements.min.js

(function(){function p(e){e.stopPropagation()}function r(o,e,l){o.addEventListener(e,l)}function s(o,e,l){o.removeEventListener(e,l)}function e(){for(var a=0,b=c,d=q('*');b=d.item(a++);){var z=b.classList;z&&z.remove('h7374');s(b,t,f),s(b,u,g),s(b,x,o),s(b,v,h);s(c,w,k);}}function h(a){(a.which==3||a.button==2)?e():this.parentNode.removeChild(this);a.preventDefault();p(a);return 0}function o(a){if(a.which==3||a.button==2)e();a.preventDefault();p(a);return 0}function g(a){var z=this.classList;z&&z.remove('h7374');p(a);return 0}function f(a){var z=this.classList;z&&z.add('h7374');p(a);return 0}function k(a){27==a.keyCode&&e()}var c=document,n=c.body,q=n.getElementsByTagName.bind(n),t='mouseover',u='mouseout',x='mousedown',v='mouseup',w='keydown';c.styleSheets[0].addRule('.h7374','background:red !important');for(var l=0,d,m=q('*');d=m.item(l++);)r(d,t,f),r(d,u,g),r(d,x,o),r(d,v,h);r(c,w,k)})();