collect hrefs, srcs, urls on the page

grabber.js

(function(undefined, body, selectors){

    var collection = [];
    var current;

    for(var key in selectors){
        current = body.querySelectorAll(selectors[key]);
        current = [].slice.call(current);
        current = current.map(function(i){ return i[key] });

        collection = collection.concat(current);
    }

    return collection;

})(undefined, document.body, {
    href : "[href]",
    src : "img"
});

grabber_v2.js

(function(body, selectors){

    var
        collection = [],
        current, isStyle, url;

    for(var key in selectors){

        var selector = selectors[key];

        // collect nodes
        current = body.querySelectorAll(selector);
        // convert to array
        current = [].slice.call(current);
        // check if style
        isStyle = selector.indexOf("style") > -1;

        // iterate over search map
        current = current.map(function(i){
            if(isStyle) {
                // url(http://foo.bar) --> http://foo.bar
                url = i.style.backgroundImage.replace(/(url\()(.+)(\))/g, "$2");
            } else {
                url = i[key];
            }

            return url;
        });

        collection = collection.concat(current);
    }

    return collection;

})(document.body, {
    href : "a[href]",
    src : "img[src]",
    url : "[style*=url]"
});