Element.alter.js

Element.implement('alter', function(properties){
	var parsed = Slick.parse(properties).expressions[0][0],
		attributes = parsed.attributes,
		classList = parsed.classList,
		i, attr, value;

	if (attributes) for (i = 0; i < attributes.length; i++){
		attr = attributes[i];
		value = null;

		if (attr.value != null && attr.operator == '=') value = attr.value;
		else if (!attr.value && !attr.operator) value = true;

		this.set(attr.key, value);
	}

	if (classList) for (i = 0; i < classList.length; i++) {
		this.addClass(classList[i]);
	}

	return this;
});