- return this.domManip(arguments, false, function(elem){
- this.parentNode.insertBefore( elem, this );
- });
+ if ( this[0] && this[0].parentNode ) {
+ return this.domManip(arguments, false, function(elem){
+ this.parentNode.insertBefore( elem, this );
+ });
+ } else if ( arguments.length ) {
+ var set = jQuery(arguments[0]);
+ set.push.apply( set, this.toArray() );
+ return this.pushStack( set, "before", arguments );
+ }