JavaScript解析浏览器路径的一个方法

function parseURL(url) {
 var a = document.createElement('a');
 //创建一个链接
 a.href = url;
 return {
 source: url,
 protocol: a.protocol.replace(':',''),
 host: a.hostname,
 port: a.port,
 query: a.search,
 params: (function(){
 var ret = {},
 seg = a.search.replace(/^\?/,'').split('&'),
 len = seg.length, i = 0, s;
 for (;i<len;i++) {
 if (!seg[i]) { continue; }
 s = seg[i].split('=');
 ret[s[0]] = s[1];
 }
 return ret;
 })(),
 file: (a.pathname.match(/\/([^\/?#]+)$/i) || [,''])[1],
 hash: a.hash.replace('#',''),
 path: a.pathname.replace(/^([^\/])/,'/$1'),
 relative: (a.href.match(/tps?:\/\/[^\/]+(.+)/) || [,''])[1],
 segments: a.pathname.replace(/^\//,'').split('/')
 };
}

var myURL = parseURL('http://abc.com:8080/dir/index.html?id=255&m=hello#top');
myURL.file; // = 'index.html'
myURL.hash; // = 'top'
myURL.host; // = 'abc.com'
myURL.query; // = '?id=255&m=hello'
myURL.params; // = Object = { id: 255, m: hello }
myURL.path; // = '/dir/index.html'
myURL.segments; // = Array = ['dir', 'index.html']
myURL.port; // = '8080'
myURL.protocol; // = 'http'
myURL.source; // = 'http://abc.com:8080/dir/index.html?id=255&m=hello#top'