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);

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

Roshambo jQuery方法没有处理解码URL

http://snipplr.com/view/26662/get-url-parameters-with-jquery--improved/

在return语句中添加时也添加了该功能

return decodeURIComponent(results[1].replace(/\+/g, " ")) || 0;

现在您可以找到更新的要点：

$.urlParam = function(name){
var results = new RegExp('[\\?&]' + name + '=([^&#]*)').exec(window.location.href);
if (!results) { return 0; }
return decodeURIComponent(results[1].replace(/\+/g, " ")) || 0;
}

tl；博士

一个快速、完整的解决方案，可处理多值键和编码字符。

// using ES5   (200 characters)
var qd = {};
if (location.search) location.search.substr(1).split("&").forEach(function(item) {var s = item.split("="), k = s[0], v = s[1] && decodeURIComponent(s[1]); (qd[k] = qd[k] || []).push(v)})

// using ES6   (23 characters cooler)
var qd = {};
if (location.search) location.search.substr(1).split`&`.forEach(item => {let [k,v] = item.split`=`; v = v && decodeURIComponent(v); (qd[k] = qd[k] || []).push(v)})

// as a function with reduce
function getQueryParams() {
  return location.search
    ? location.search.substr(1).split`&`.reduce((qd, item) => {let [k,v] = item.split`=`; v = v && decodeURIComponent(v); (qd[k] = qd[k] || []).push(v); return qd}, {})
    : {}
}

多行：

var qd = {};
if (location.search) location.search.substr(1).split("&").forEach(function(item) {
    var s = item.split("="),
        k = s[0],
        v = s[1] && decodeURIComponent(s[1]); //  null-coalescing / short-circuit
    //(k in qd) ? qd[k].push(v) : qd[k] = [v]
    (qd[k] = qd[k] || []).push(v) // null-coalescing / short-circuit
})

这是什么代码。。。“零合并”，短路评估ES6解构赋值、箭头函数、模板字符串####示例：

"?a=1&b=0&c=3&d&e&a=5&a=t%20e%20x%20t&e=http%3A%2F%2Fw3schools.com%2Fmy%20test.asp%3Fname%3Dståle%26car%3Dsaab"
> qd
a: ["1", "5", "t e x t"]
b: ["0"]
c: ["3"]
d: [undefined]
e: [undefined, "http://w3schools.com/my test.asp?name=ståle&car=saab"]

> qd.a[1]    // "5"
> qd["a"][1] // "5"

---

阅读更多。。。关于Vanilla JavaScript解决方案。

要访问URL的不同部分，请使用位置。（搜索|哈希）

最简单（虚拟）解决方案

var queryDict = {};
location.search.substr(1).split("&").forEach(function(item) {queryDict[item.split("=")[0]] = item.split("=")[1]})

正确处理空钥匙。使用找到的最后一个值覆盖多键。

"?a=1&b=0&c=3&d&e&a=5"
> queryDict
a: "5"
b: "0"
c: "3"
d: undefined
e: undefined

多值键

简单的密钥检查（字典中的项目）？dict.item.push（val）：dict.item=[val]

var qd = {};
location.search.substr(1).split("&").forEach(function(item) {(item.split("=")[0] in qd) ? qd[item.split("=")[0]].push(item.split("=")[1]) : qd[item.split("=")[0]] = [item.split("=")[1]]})

现在返回数组。按qd.key[index]或qd[key][index]访问值

> qd
a: ["1", "5"]
b: ["0"]
c: ["3"]
d: [undefined]
e: [undefined]

编码字符？

对第二次或两次拆分使用decodeURIComponent（）。

var qd = {};
location.search.substr(1).split("&").forEach(function(item) {var k = item.split("=")[0], v = decodeURIComponent(item.split("=")[1]); (k in qd) ? qd[k].push(v) : qd[k] = [v]})

####示例：

"?a=1&b=0&c=3&d&e&a=5&a=t%20e%20x%20t&e=http%3A%2F%2Fw3schools.com%2Fmy%20test.asp%3Fname%3Dståle%26car%3Dsaab"
> qd
a: ["1", "5", "t e x t"]
b: ["0"]
c: ["3"]
d: ["undefined"]  // decodeURIComponent(undefined) returns "undefined" !!!*
e: ["undefined", "http://w3schools.com/my test.asp?name=ståle&car=saab"]

---

# From comments **\*!!!** Please note, that `decodeURIComponent(undefined)` returns string `"undefined"`. The solution lies in a simple usage of [`&&`][5], which ensures that `decodeURIComponent()` is not called on undefined values. _(See the "complete solution" at the top.)_

v = v && decodeURIComponent(v);

If the querystring is empty (`location.search == ""`), the result is somewhat misleading `qd == {"": undefined}`. It is suggested to check the querystring before launching the parsing function likeso:

if (location.search) location.search.substr(1).split("&").forEach(...)

这个很好用。其他一些答案中的正则表达式引入了不必要的开销。

function getQuerystring(key) {
    var query = window.location.search.substring(1);
    var vars = query.split("&");
    for (var i = 0; i < vars.length; i++) {
        var pair = vars[i].split("=");
        if (pair[0] == key) {
            return pair[1];
        }
    }
}

从这里取的

这会奏效的。。。您需要在需要通过传递其名称来获取参数的地方调用此函数。。。

function getParameterByName(name)
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  alert(results[1]);
  if (results == null)
    return "";
  else
    return results[1];
}