Explain and get the parameters in the URL address

/* Parse URL address parsurl ( url ) .file;     // =  ' index.html '    Parsurl ( url ) .hash;     // =  ' top '   parsurl ( url  ) .host;     // =  ' www.abc.com '   parsurl ( url ). query;    // =  '? Id=255&m=hello '   parsurl ( url ). queryurl  // =  ' Id=255&m=hello '  parsurl ( url ) .params;    // = object = { id: 255, m: hello }  parsurl (  url ) .prefix;   // =  ' www ' parsurl ( url ) .path;      // =  '/dir/index.html '   parsurl ( url ). segments; // =  array = [' dir ',  ' index.html ']  parsurl ( url ) .port;      // =  ' 8080 ' &nbSp; parsurl ( url ) .protocol; // =  ' http '   parsurl ( url ). source;   // =  ' Http://www.abc.com:8080/dir/index.html?id=255&m=hello#top '  * /function parsurl ( 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;  }) (),   Queryurl:a.search.replacE (/^\?/, '),                 Prefix: a.hostname.split ('. ') [0],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 ('/')};  }

Explain and get the parameters in the URL address