解析URL各部分的通用方法

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("/")
 };
}

调用结果：