javascript怎么获取请求参数

window.location.href

function getUrlParam(name) {
//构造一个含有目标参数的正则表达式对象
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
//匹配目标参数
var r = window.location.search.substr(1).match(reg);
//返回参数值
if(r != null) {
return decodeURI(r[2]);
}
return null;
}

http://127.0.0.1:8020/JavaScriptFunction/index.html?bb=1&aa='张三'

var bb = getUrlParam('bb');
var aa = getUrlParam('aa')

(function($) {
$.getUrlParam = function(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if(r != null) return decodeURI(r[2]);
return null;
}
})(jQuery);

   encodeURI()   decodeURI() 
    encodeURIComponent()    decodeURIComponent()