+
+jQuery.extend({
+ filter: function( expr, elems, not ) {
+ if ( not ) {
+ expr = ":not(" + expr + ")";
+ }
+
+ return jQuery.find.matches(expr, elems);
+ },
+
+ dir: function( elem, dir ) {
+ var matched = [], cur = elem[dir];
+ while ( cur && cur.nodeType !== 9 ) {
+ if ( cur.nodeType === 1 ) {
+ matched.push( cur );
+ }
+ cur = cur[dir];
+ }
+ return matched;
+ },
+
+ nth: function( cur, result, dir, elem ) {
+ result = result || 1;
+ var num = 0;
+
+ for ( ; cur; cur = cur[dir] ) {
+ if ( cur.nodeType === 1 && ++num === result ) {
+ break;
+ }
+ }
+
+ return cur;
+ },
+
+ sibling: function( n, elem ) {
+ var r = [];
+
+ for ( ; n; n = n.nextSibling ) {
+ if ( n.nodeType === 1 && n !== elem ) {
+ r.push( n );
+ }
+ }
+
+ return r;
+ }
+});