I never like having iframes in production sites source codes so when management decided to add the ‘facebook like’ widget thing, I decided to move it outside of the source and into a javascript abstraction. Easiest and most convenient way to do so is via extending the Element prototype in mootools (via Element.implement()):

Element.implement({
    facebookLike: function(url, options) {
        var options = $merge({
            show_faces: "false",
            layout: "standard",
            width: 450,
            action: "like",
            font: "lucida grande",
            colorscheme: "light",
            height: 30,
            href: url
        }, options);

        var src= "http://www.facebook.com/plugins/like.php?href={href}&layout={layout}&show_faces={show_faces}&width={width}&action={action}&font={font}&colorscheme={colorscheme}&height={height}".substitute(options);
        return this.adopt(new Element("iframe", {
            styles: {
                border: "none",
                overflow: "hidden",
                width: options.width,
                height: options.height
            },
            id: "FBFrame",
            frameborder: 0,
            allowTransparency: "true",
            scrolling: "no",
            src: src
        }));
    }
});

// exmaple use:
document.id("like").facebookLike("http://fragged.org/", {
    width: 400,
    height: 30
});

Why would you want to do that instead of the default interface? Because it will speed up page load and abstract this into domready / onload events. It also allows you to produce multiples very easily via a a selector, eg,

// if in your markup you have a number of 
anchor text

// then target them, get the link's href and apply the like button instead
document.getElements("div.like").each(function(el) {
    var urlToLike = el.getFirst().get("href");
    el.empty().faceboookLike(urlToLike);
});

All of the facebook options like button plugin are “supported” – you can find the list here

Finally, here’s what it looks like:

Play with it some more on the jsfiddle: click here