利用a标签自动解析URL

 1 function parseURL(url) {
 2     var a =  document.createElement('a');
 3     a.href = url;
 4     return {
 5         source: url,
 6         protocol: a.protocol.replace(':',''),
 7         host: a.hostname,
 8         port: a.port||'80',
 9         query: a.search,
10         params: (function(){
11             var ret = {},
12                 seg = a.search.replace(/^?/,'').split('&'),
13                 len = seg.length, i = 0, s;
14             for (;i<len;i++) {
15                 if (!seg[i]) { continue; }
16                 s = seg[i].split('=');
17                 ret[s[0]] = s[1];
18             }
19             return ret;
20         })(),
21         file: (a.pathname.match(//([^/?#]+)$/i) || [,''])[1],
22         hash: a.hash.replace('#',''),
23         path: a.pathname.replace(/^([^/])/,'/$1'),
24         relative: (a.href.match(/tps?://[^/]+(.+)/) || [,''])[1],
25         segments: a.pathname.replace(/^//,'').split('/')
26     };
27 }

console.log(parseURL("http://www.w3school.com.cn/jsref/dom_obj_anchor.asp?type=2#id2"));

 1 {
 2     file: "dom_obj_anchor.asp",
 3     hash: "id2",
 4     host: "www.w3school.com.cn",
 5     params: {type: "2"},
 6     path: "/jsref/dom_obj_anchor.asp",
 7     port: "80",
 8     protocol: "http",
 9     query: "?type=2",
10     relative: "/jsref/dom_obj_anchor.asp?type=2#id2",
11     segments: [0: "jsref",1: "dom_obj_anchor.asp"],
12     source: "http://www.w3school.com.cn/jsref/dom_obj_anchor.asp?type=2#id2"
13 }