我接受了这个答案，并添加了对可选地将URL作为参数传入的支持；返回到window.location.search。显然，这对于从不是当前页面的URL获取查询字符串参数非常有用：

(function($, undef) {
  $.QueryString = function(url) {
    var pairs, qs = null, index, map = {};
    if(url == undef){
      qs = window.location.search.substr(1);
    }else{
      index = url.indexOf('?');
      if(index == -1) return {};
      qs = url.substring(index+1);
    }
    pairs = qs.split('&');
    if (pairs == "") return {};
    for (var i = 0; i < pairs.length; ++i)
    {
      var p = pairs[i].split('=');
      if(p.length != 2) continue;
      map[p[0]] = decodeURIComponent(p[1].replace(/\+/g, " "));
    }
    return map;
  };
})(jQuery);

此函数将根据需要使用递归返回已解析的JavaScript对象，其中包含任意嵌套的值。

这里有一个jsfiddle示例。

[
  '?a=a',
  '&b=a',
  '&b=b',
  '&c[]=a',
  '&c[]=b',
  '&d[a]=a',
  '&d[a]=x',
  '&e[a][]=a',
  '&e[a][]=b',
  '&f[a][b]=a',
  '&f[a][b]=x',
  '&g[a][b][]=a',
  '&g[a][b][]=b',
  '&h=%2B+%25',
  '&i[aa=b',
  '&i[]=b',
  '&j=',
  '&k',
  '&=l',
  '&abc=foo',
  '&def=%5Basf%5D',
  '&ghi=[j%3Dkl]',
  '&xy%3Dz=5',
  '&foo=b%3Dar',
  '&xy%5Bz=5'
].join('');

给出以上任何测试示例。

var qs = function(a) {
  var b, c, e;
  b = {};
  c = function(d) {
    return d && decodeURIComponent(d.replace(/\+/g, " "));
  };
  e = function(f, g, h) {
    var i, j, k, l;
    h = h ? h : null;
    i = /(.+?)\[(.+?)?\](.+)?/g.exec(g);
    if (i) {
      [j, k, l] = [i[1], i[2], i[3]]
      if (k === void 0) {
        if (f[j] === void 0) {
          f[j] = [];
        }
        f[j].push(h);
      } else {
        if (typeof f[j] !== "object") {
          f[j] = {};
        }
        if (l) {
          e(f[j], k + l, h);
        } else {
          e(f[j], k, h);
        }
      }
    } else {
      if (f.hasOwnProperty(g)) {
        if (Array.isArray(f[g])) {
          f[g].push(h);
        } else {
          f[g] = [].concat.apply([f[g]], [h]);
        }
      } else {
        f[g] = h;
      }
      return f[g];
    }
  };
  a.replace(/^(\?|#)/, "").replace(/([^#&=?]+)?=?([^&=]+)?/g, function(m, n, o) {
    n && e(b, c(n), c(o));
  });
  return b;
};

如果需要数组样式参数，URL.js支持任意嵌套的数组样式参数以及字符串索引（映射）。它还处理URL解码。

url.get("val[0]=zero&val[1]=one&val[2]&val[3]=&val[4]=four&val[5][0]=n1&val[5][1]=n2&val[5][2]=n3&key=val", {array:true});
// Result
{
    val: [
        'zero',
        'one',
        true,
        '',
        'four',
        [ 'n1', 'n2', 'n3' ]
    ]
    key: 'val'
}

试试看：

String.prototype.getValueByKey = function(k){
    var p = new RegExp('\\b'+k+'\\b','gi');
    return this.search(p) != -1 ? decodeURIComponent(this.substr(this.search(p)+k.length+1).substr(0,this.substr(this.search(p)+k.length+1).search(/(&|;|$)/))) : "";
};

然后这样称呼：

if(location.search != "") location.search.getValueByKey("id");

您还可以将此用于cookie：

if(navigator.cookieEnabled) document.cookie.getValueByKey("username");

这只适用于key=value[&|；|$]。。。将无法处理对象/数组。

如果您不想使用String.prototype。。。将其移动到函数并将字符串作为参数传递

快速、轻松、快速：

功能：

function getUrlVar() {
    var result = {};
    var location = window.location.href.split('#');
    var parts = location[0].replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
        result [key] = value;
    });
    return result;
}

用法：

var varRequest = getUrlVar()["theUrlVarName"];

这些都是很好的答案，但我需要一些更强大的东西，我想你们可能都想拥有我创造的东西。

这是一种简单的库方法，可以对URL参数进行剖析和操作。静态方法有以下子方法，可以在主题URL上调用：

获取主机获取路径获取哈希setHash获取参数获取查询setParam（设置参数）获取参数hasParamremoveParam（删除参数）

例子：

URLParser(url).getParam('myparam1')

var url = "http://www.example.com/folder/mypage.html?myparam1=1&myparam2=2#something";

function URLParser(u){
    var path="",query="",hash="",params;
    if(u.indexOf("#") > 0){
        hash = u.substr(u.indexOf("#") + 1);
        u = u.substr(0 , u.indexOf("#"));
    }
    if(u.indexOf("?") > 0){
        path = u.substr(0 , u.indexOf("?"));
        query = u.substr(u.indexOf("?") + 1);
        params= query.split('&');
    }else
        path = u;
    return {
        getHost: function(){
            var hostexp = /\/\/([\w.-]*)/;
            var match = hostexp.exec(path);
            if (match != null && match.length > 1)
                return match[1];
            return "";
        },
        getPath: function(){
            var pathexp = /\/\/[\w.-]*(?:\/([^?]*))/;
            var match = pathexp.exec(path);
            if (match != null && match.length > 1)
                return match[1];
            return "";
        },
        getHash: function(){
            return hash;
        },
        getParams: function(){
            return params
        },
        getQuery: function(){
            return query;
        },
        setHash: function(value){
            if(query.length > 0)
                query = "?" + query;
            if(value.length > 0)
                query = query + "#" + value;
            return path + query;
        },
        setParam: function(name, value){
            if(!params){
                params= new Array();
            }
            params.push(name + '=' + value);
            for (var i = 0; i < params.length; i++) {
                if(query.length > 0)
                    query += "&";
                query += params[i];
            }
            if(query.length > 0)
                query = "?" + query;
            if(hash.length > 0)
                query = query + "#" + hash;
            return path + query;
        },
        getParam: function(name){
            if(params){
                for (var i = 0; i < params.length; i++) {
                    var pair = params[i].split('=');
                    if (decodeURIComponent(pair[0]) == name)
                        return decodeURIComponent(pair[1]);
                }
            }
            console.log('Query variable %s not found', name);
        },
        hasParam: function(name){
            if(params){
                for (var i = 0; i < params.length; i++) {
                    var pair = params[i].split('=');
                    if (decodeURIComponent(pair[0]) == name)
                        return true;
                }
            }
            console.log('Query variable %s not found', name);
        },
        removeParam: function(name){
            query = "";
            if(params){
                var newparams = new Array();
                for (var i = 0;i < params.length;i++) {
                    var pair = params[i].split('=');
                    if (decodeURIComponent(pair[0]) != name)
                          newparams .push(params[i]);
                }
                params = newparams;
                for (var i = 0; i < params.length; i++) {
                    if(query.length > 0)
                        query += "&";
                    query += params[i];
                }
            }
            if(query.length > 0)
                query = "?" + query;
            if(hash.length > 0)
                query = query + "#" + hash;
            return path + query;
        },
    }
}

document.write("Host: " + URLParser(url).getHost() + '<br>');
document.write("Path: " + URLParser(url).getPath() + '<br>');
document.write("Query: " + URLParser(url).getQuery() + '<br>');
document.write("Hash: " + URLParser(url).getHash() + '<br>');
document.write("Params Array: " + URLParser(url).getParams() + '<br>');
document.write("Param: " + URLParser(url).getParam('myparam1') + '<br>');
document.write("Has Param: " + URLParser(url).hasParam('myparam1') + '<br>');

document.write(url + '<br>');

// Remove the first parameter
url = URLParser(url).removeParam('myparam1');
document.write(url + ' - Remove the first parameter<br>');

// Add a third parameter
url = URLParser(url).setParam('myparam3',3);
document.write(url + ' - Add a third parameter<br>');

// Remove the second parameter
url = URLParser(url).removeParam('myparam2');
document.write(url + ' - Remove the second parameter<br>');

// Add a hash
url = URLParser(url).setHash('newhash');
document.write(url + ' - Set Hash<br>');

// Remove the last parameter
url = URLParser(url).removeParam('myparam3');
document.write(url + ' - Remove the last parameter<br>');

// Remove a parameter that doesn't exist
url = URLParser(url).removeParam('myparam3');
document.write(url + ' - Remove a parameter that doesn\"t exist<br>');