GistRequest.js

var GistRequest = {

	fxScroll: new Fx.Scroll(document.body, {offset: {y: -20}}),
	proxy: 'proxy.php',

	init: function() {
		this.lookForGists();
	},

	lookForGists: function() {
		var gists = $$('a').filter(this.filterGists);
		gists.each(this.addGistAction.bind(this));
	},

	addGistAction: function(item, i, arr) {
		item.addEvent('click', this.gistClick.bindWithEvent(this, item));
		if(item.get('rel') == 'auto') this.gistClick(null, item, true);
	
	},

	filterGists: function(item, i, arr) {
		return item.get('href').test(/^https?:\/\/gist/);
	},

	gistClick: function(e, item) {
		if(e) e.stop();
	
		var wrapper = item.retrieve('wrapper');
	
		if(wrapper) {
			this.fxScroll.toElement(item);
			wrapper.slide('toggle');
		}else{
		
			wrapper = new Element('div');
			item.store('wrapper', wrapper);

			wrapper.inject(item.getParent(), 'after');
			wrapper.slide('hide');
		
			var request = new Request.HTML({
				url: this.proxy,
				update: wrapper,
				onComplete: this.gistClick.bind(this, [null, item])
			});

			request.get({url: item.get('href') + '.pibb'});

		}
	
	}
}