Proto-Crawler.js

var output = (function ( object ) {
    
    "use strict";
    
    var names = [];
    var props = Object.getOwnPropertyNames( object );
    var proto = Object.getPrototypeOf( object );
    
    while ( proto ) {
        names = Object.getOwnPropertyNames( proto );
        for ( var i = 0; i < names.length; i++ ) {
            if ( props.indexOf( names[i] ) < 0 ) {
                props.push( names[i] );
            }
        }
        proto = Object.getPrototypeOf( proto );
    }
    
    props = props.sort(function ( a, b ) {
        return a < b ? -1 : a > b ? 1 : 0;
    });
    
    return props;
    
}( this ));

/* Choose how you'd like it output */
document.body.style.whiteSpace = "pre";
document.body.textContent = JSON.stringify( output, null, "\t" );