<script type="text/javascript"> 
 
// 说明：一个非常健全的 Javascript 链接(URL)解析类 
// 整理：http://www.CodeBit.cn 
 
/**  
* @projectDescription     Poly9's polyvalent URLParser class 
* 
* @author    Denis Laprise - denis@poly9.com - http://poly9.com 
* @version    0.1  
* @namespace    Poly9 
* 
* See the unit test file for more examples. 
* URLParser is freely distributable under the terms of an MIT-style license. 
*/ 
 
if (typeof Poly9 == 'undefined') 
{ 
    var Poly9 = {}; 
} 
 
/** 
 * Creates an URLParser instance 
 * 
 * @classDescription    Creates an URLParser instance 
 * @return {Object}    return an URLParser object 
 * @param {String} url    The url to parse 
 * @constructor 
 * @exception {String}  Throws an exception if the specified url is invalid 
 */ 
Poly9.URLParser = function(url) { 
 
    this._fields = { 
        'Username' : 4,  
        'Password' : 5,  
        'Port' : 7,  
        'Protocol' : 2,  
        'Host' : 6,  
        'Pathname' : 8,  
        'URL' : 0,  
        'Querystring' : 9,  
        'Fragment' : 10 
    }; 
 
    this._values = {}; 
    this._regex = null; 
    this.version = 0.1; 
    this._regex = /^((\w+):\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?(\w*)/; 
 
    for(var f in this._fields) 
    { 
        this['get' + f] = this._makeGetter(f); 
    } 
 
    if (typeof url != 'undefined') 
    { 
        this._parse(url); 
    } 
} 
  
/** 
 * @method  
 * @param {String} url    The url to parse 
 * @exception {String}     Throws an exception if the specified url is invalid 
 */ 
Poly9.URLParser.prototype.setURL = function(url) { 
    this._parse(url); 
} 
 
Poly9.URLParser.prototype._initValues = function() { 
    for(var f in this._fields) 
    { 
        this._values[f] = ''; 
    } 
} 
 
Poly9.URLParser.prototype._parse = function(url) { 
    this._initValues(); 
    var r = this._regex.exec(url); 
    if (!r) throw "DPURLParser::_parse -> Invalid URL"; 
 
    for(var f in this._fields) if (typeof r[this._fields[f]] != 'undefined') 
    { 
        this._values[f] = r[this._fields[f]]; 
    } 
} 
 
Poly9.URLParser.prototype._makeGetter = function(field) { 
    return function() { 
        return this._values[field]; 
    } 
} 
 
</script> 
 

 
<script type="text/javascript"> 
 
var url = 'http://user:password@www.codebit.cn:9901/pub/article.php?offset=10&perpage=10#fragment'; 
 
var p = new Poly9.URLParser(url); 
 
document.write("<strong>URL:</strong> " + url + "<br /><br />"); 
document.write("解析结果如下：<br /><br />"); 
document.write("<strong>Protocol:</strong> " + p.getProtocol() + "<br />"); 
document.write("<strong>Username:</strong> " + p.getUsername() + "<br />"); 
document.write("<strong>Password:</strong> " + p.getPassword() + "<br />"); 
document.write("<strong>Host:</strong> " + p.getHost() + "<br />"); 
document.write("<strong>Port:</strong> " + p.getPort() + "<br />"); 
document.write("<strong>Pathname:</strong> " + p.getPathname() + "<br />"); 
document.write("<strong>Query String:</strong> " + p.getQuerystring() + "<br />"); 
document.write("<strong>Fragment:</strong> " + p.getFragment() + "<br />"); 
 
</script>