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/* Usage
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'
*/
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('/')
	};
}