<html><body><script type="text/javascript">var str="moon"; var patt1=/\bm/;var patt2=/oo\b/;var patt3=/oon\b/;var patt4=/\w\b\w/;document.write(str.match(patt1) + "<br>");document.write(str.match(patt2) + "<br>");document.write(str.match(patt3) + "<br>");document.write(str.match(patt4) + "<br>");</script></body></html>