if ( !selector || typeof selector !== "string" ) {
return results;
}
var parts = [], m, set, checkSet, check, mode, extra, prune = true, contextXML = isXML(context);
if ( !selector || typeof selector !== "string" ) {
return results;
}
var parts = [], m, set, checkSet, check, mode, extra, prune = true, contextXML = isXML(context);