自动解析URL

 function parseURL(url) {
     var a =  document.createElement('a');
     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('/')
     };}