Element.prototype.matches||(Element.prototype.matches=Element.prototype.matchesSelector||Element.prototype.mozMatchesSelector||Element.prototype.msMatchesSelector||Element.prototype.oMatchesSelector||Element.prototype.webkitMatchesSelector||function(e){for(var t=(this.document||this.ownerDocument).querySelectorAll(e),o=t.length;0<=--o&&t.item(o)!==this;);return-1<o});