JavaScript regexp exec
<html>
<body>
<script type="text/javascript">
var patt1=new RegExp("e");
document.write(patt1.exec("The best things in life are free"));
</script>
</body>
</html>
<body>
<script type="text/javascript">
var patt1=new RegExp("e");
document.write(patt1.exec("The best things in life are free"));
</script>
</body>
</html>
Result
