1721   document._getElementsByXPath = function(expression, parentElement) {  argument
1723     var query = document.evaluate(expression, $(parentElement) || document,
2027   up: function(element, expression, index) {  argument
2031     return Object.isNumber(expression) ? ancestors[expression] :
2032       Selector.findElement(ancestors, expression, index);
2035   down: function(element, expression, index) {  argument
2038     return Object.isNumber(expression) ? Element.descendants(element)[expression] :
2039       Element.select(element, expression)[index || 0];
2042   previous: function(element, expression, index) {  argument
2046     return Object.isNumber(expression) ? previousSiblings[expression] :
2047       Selector.findElement(previousSiblings, expression, index);
2050   next: function(element, expression, index) {  argument
2054     return Object.isNumber(expression) ? nextSiblings[expression] :
2055       Selector.findElement(nextSiblings, expression, index);
2729       Element.Methods.down = function(element, expression, index) {  argument
2732         return Object.isNumber(expression) ? _descendants(element)[expression] :
2733           Element.select(element, expression)[index || 0];
3160   initialize: function(expression) {  argument
3161     this.expression = expression.strip();
3198       var e = this.expression;
3222       Selector._div.querySelector(this.expression);
3231     var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
3258     Selector._cache[this.expression] = this.matcher;
3262     var e = this.expression, ps = Selector.patterns,
3284     Selector._cache[this.expression] = this.xpath;
3289     var e = this.expression, results;
3313     var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
3344     return this.expression;
3348     return "#<Selector:" + this.expression.inspect() + ">";
3868   split: function(expression) {  argument
3870     expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
3876   matchElements: function(elements, expression) {  argument
3877     var matches = $$(expression), h = Selector.handlers;
3885   findElement: function(elements, expression, index) {  argument
3886     if (Object.isNumber(expression)) {
3887       index = expression; expression = false;
3889     return Selector.matchElements(elements, expression || '*')[index || 0];
4334   function findElement(event, expression) {  argument
4336     if (!expression) return element;
4338     return Selector.findElement(elements, expression, 0);