<html><head></head><body> <script>var str = "The quick brown fox jumps over the lazy dog.";document.write(str.substr(4, 15)); // Prints: quick brown foxdocument.write(str.substr(-28, -19)); // Prints nothingdocument.write(str.substr(-28, 9)); // Prints: fox jumpsdocument.write(str.substr(31)); // Prints: the lazy dog. </script></body></html>