MatchNodeR.js

var reSingularCombinator = /^\!?[>+^]$/; // "+", ">", "^"
local.matchNodeR = function(node, selector, needle){
	var parsed = this.Slick.parse(selector);
	if (!parsed) return true;

	parsed = parsed.reverse();
	for (var i = 0, expression, expressions, built, length, multiple; expression = parsed.expressions[i]; i++) {
		var first = expression[0];
		if (local.matchSelector(node, first.tag.toUpperCase(), first.id, first.classes, first.attributes, first.pseudos)) { // matching first selector against element
			if ((length = expression.length) == 1) continue;
			if (!built) built = {Slick: true, expressions: [], length: 0};
			built.expressions.push(expressions  = []);
			built.length++;
			for (var j = 1; j < length; j++) expressions.push(expression[j]);
			if (!multiple) multiple = !expression[expression.length - 1].combinator.match(reSingularCombinator);
		} else return false;
	}
	var found = built ? this.search(node, built, null, !(multiple && needle)) : node;
	return needle ? (multiple ? found.indexOf(needle) > -1 : found == needle) : !!found;
};