xpath.js

javascript:(function(){
  //inspired by http://userscripts.org/scripts/show/8924
  var s = document.createElement('script');
  s.setAttribute('src','http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js');
  if(typeof jQuery=='undefined') document.getElementsByTagName('head')[0].appendChild(s);
  (function() {
    if(typeof jQuery=='undefined') setTimeout(arguments.callee, 100)
    else{
      jQuery("*").one("click",function(event){
        //http://snippets.dzone.com/posts/show/4349
        jQuery(this)[0].scrollIntoView();
        for(var path = '', elt = jQuery(this)[0]; elt && elt.nodeType==1; elt=elt.parentNode){
          var idx = jQuery(elt.parentNode).children(elt.tagName).index(elt)+1;
          idx>1 ? (idx='['+idx+']') : (idx='');
          path='/'+elt.tagName.toLowerCase()+idx+path;
        }
        window.location.hash = "#xpath:"+path
        event.preventDefault()
        event.stopPropagation()
        jQuery("*").unbind("click",arguments.callee);
      })
    }
  })();
})()