gistfile1.rb

/* get full dom path to the element */
var path = [];
var el = $0;

do {
    path.unshift(el.nodeName + (el.className ? ' class="' + el.className + '"' : ''));
} while ((el.nodeName.toLowerCase() != 'html') && (el = el.parentNode));

console.log(path.join(" > "));