compile() 既可以改变检索模式，也可以添加或删除第二个参数
<html>
<head>
<script type="text/javascript">
var patt1=new RegExp("e");
document.write(patt1.test("The best things in life are free"));
patt1.compile("d");
document.write(patt1.test("The best things in life are free"));
</script>
</head>
<body>
</body>
</html>本文出自 “素颜” 博客，请务必保留此出处http://suyanzhu.blog.51cto.com/8050189/1902366
原文：http://suyanzhu.blog.51cto.com/8050189/1902366