正则笔记

var str = "aefae124332"
str.match(/\d+/g);

var str = "Visit W3School";
var patt = new RegExp("W3School","g");
var result;

while ((result = patt.exec(str)) != null)  {
  document.write(result);
  document.write("<br />");
  document.write(patt.lastIndex);
 }