13.1.4 input属性.html

javascript即用即差核心对象手册

<script>
   var ostr="abcDdefCDDE";
   var re=/cd+e/i;
   document.write(ostr+"<br>")
   ostr.match(re);
   document.write(RegExp.input+"<br>");
   document.write(RegExp.$_+"<br>");
</script>