Bookmarklet to hide a page element on click

gistfile1.txt

javascript:
(function(){
  var d=document,useMine=true,prevEl;
  function AddHandler(orig,mine) {
    return function(e){
      if(useMine)
        mine(e);
      else
        if(orig)
          orig(e);
    }
    ;
  }
  function Myonmouseover(e) {
    var evt=e||window.event;
    var elem=evt.target||evt.srcElement;
    elem.style.outline='2px solid gray';
    prevEl=elem;
  }
  function Myonmouseout(e){
    var evt=e||window.event;
    var elem=evt.target||evt.srcElement;
    elem.style.outline='';
  }
  function Myonclick(e){
    var evt=e||window.event;
    var elem=evt.target||evt.srcElement;
    elem.style.display='none';
  }
  function Myonkeydown(e){
    var evt=e||window.event;
    if(evt.keyCode==27){
      prevEl.style.outline='';
      useMine=false;
    }
  }
  d.onmouseover=AddHandler(d.onmouseover,Myonmouseover);
  d.onmouseout=AddHandler(d.onmouseout,Myonmouseout);
  d.onclick=AddHandler(d.onclick,Myonclick);
  d.onkeydown=AddHandler(d.onkeydown,Myonkeydown);
}
)()