javascript用正则表达式提取网址中的参数

直接上代码

<script type="text/javascript">    var url = "http://www.***.com/n/2013/01/08/1037962.shtml";    //url = "http://www.***.com/mine/mine_show.aspx?id=1037962";    var reg = /\/\d+.shtml|\?id\=\d+/gi;    var result;    if((result = reg.exec(url)) != null){        result += "";        var id = result.match(/\d+/g);        alert(id);    }</script>

参考文章

http://www.w3school.com.cn/js/jsref_obj_regexp.asp

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下面的两条语句是等价的： 
re = new RegExp("\\w+","gi") 
re = /\w+/gi