Improved "perceived" performance of AddThis

addthis.css

.addthis_toolbox, .addthis_toolbox iframe {
	visibility: hidden !important;
}

.addthis-loaded .addthis_toolbox, .addthis-loaded .addthis_toolbox iframe {
	visibility: visible !important;
}

addthis.js

// Run after addthis include, on domready or similar
if (addthis) {
	var addthisLoaded = function() {
		window.setTimeout(function() {
			document.documentElement.className += ' addthis-loaded';
		}, 2000); // Magic number
	};
	
	if (addthis.addEventListener)
		addthis.addEventListener('addthis.ready', addthisLoaded);
	else if (addthis.attachEvent)
		addthis.attachEvent('onaddthis.ready', addthisLoaded);
}