<code>function matchDemo(){

   var s;

   var re = new RegExp("d(b+)(d)","ig");

   var str = "cdbBdbsbdbdz";

   var arr = re.exec(str);

   s = "$1 contains: " + <span class="cfe"><b>RegExp.$1</b></span> + "\n";

   s += "$2 contains: " + <span class="cfe"><b>RegExp.$2</b></span> + "\n";

   s += "$3 contains: " + <span class="cfe"><b>RegExp.$3</b></span>;

   return(s);

}</code>