**I. URL resolution function **

<script> 
/**
*@param {string} url  The complete URL address
*@returns {object}  Custom objects
*@description  Usage examples: 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('/') 
 }; 
}   

//var myURL = parseURL('http://abc.com:8080/dir/index.html?id=255&m=hello#top'); 
var myURL = parseURL('http://localhost:8080/test/mytest/toLogina.ction?m=123&pid=abc'); 
alert(myURL.path); 
alert(myURL.params.m); 
alert(myURL.params.pid); 
</script>

Second, JS section URL resolution

URL: Uniform Resource Locator (URL) The complete URL consists of these parts: scheme://host:port/path? Query# fragments

scheme  =  Communication protocol  ( The commonly used http,ftp,maito Etc. )
host =  The host  ( Domain name or IP)
port =  The port number
path =  The path
query =  Query (optional, used for dynamic web pages (such as using CGI , ISAPI , PHP/JSP/ASP/ASP.NET And other technologies) to pass parameters, can have multiple parameters, with the" & "Symbol separated, the name and value of each parameter by" = "Separated by symbols.
fragment =  A fragment of information (a string used to specify a fragment in a network resource. For example, a web page with more than one noun can be used fragment Locate the explanation directly to a noun. ( Also known as anchor points .) )

For a URL like this / / www.jb51.net:80/seo/? Ver = 1.0 & id = 6 # imhere

We can use javascript to get the various parts of it 1, the window. The location. The href The entire URl string (which in the browser is the entire address bar)

2, the window. The location. The protocol The protocol part of the URL Return value: HTTP:

3, the window. The location. The host The host part of the URL This example returns the value :www.jb51.net

4, the window. The location. The port The port part of the URL If the default port 80 is used (update: even if :80 is added), the return value is not the default 80 but a null character Return value of this example: ""

5, the window. The location. The pathname The path part of the URL (that is, the file address) Return value :/seo/

6, the window. The location. The search Query (parameter) section In addition to assigning values to dynamic languages, we can also assign static pages and use javascript to get the values of the parameters we believe to be appropriate Return value :? Ver = 1.0 & id = 6

7, the window. The location. The hash The anchor This example returns a value :#imhere