Evaluate CSS text to add it to the page.

EvalCssText.js

// Evaluate CSS text
// Can be used to add CSS to the page from XHR response, or localStorage, etc.
function evalCssText(text) {
    // When Base64 encoding the data URI CSS urls, such as background images will not load if they aren't fully qualified URLs
    // NOTE: Change this to whatever matches your path. All my images are loaded from a /static directory.
    text = text.replace(/\/static\//gim, window.location.protocol + '//' + window.location.host + '/static/');
    
    var href = 'data:text/css;base64,' + Base64.encode(text);
	var node = new Element('link');
	node.set('type', 'text/css');
	node.set('rel', 'stylesheet');
	node.set('href', href);
	node.inject(document.head);
}