Javascript regular expression: [a-e]


<input type="button" value="Match" onclick="javascript:demo('abefg');return false;" />
&nbsp;&nbsp;&nbsp;
<input type="button" value="No Match" onclick="javascript:demo('abpfg');return false;" />

<script type="text/javascript" language="JavaScript">
//<![CDATA[
   function demo(text) {
      var re = /ab[c-e]fg/;
      if (text.match(re)) {
         alert("match");
      } else {
         alert("no match");
      }
   }
//]]>
</script>