js get bulk browser parameters

Previously acquired browser parameters like this

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

// 调用方法
alert(GetQueryString("参数名1"));

This method is suitable to obtain a single parameter, but when more than one parameter, when will a lot of trouble, there is no way the browser parameters are placed in an object inside it? So I wrote the following this method

function getParameters() {                    //获取地址栏参数不包括hash值
            var search = decodeURI(location.search);//防止中文乱码
            search = search.replace('?', '');
            var searray = search.split("&");
            var obj = {}
            searray.map(function (item) {
                var sarry = item.split('=');
                obj[sarry[0]] = sarry[1];
            })
            return obj;
}

var para=getParameters();

It is not very simple, and very convenient

Well, then get a single first time have an advantage, at a time to get all of the advantages, so it can integrate it?

Okay, I went ahead and modifications

function getParameters(obj) {//获取地址栏参数不包括hash值
            var search = decodeURI(location.search).replace('?', '');//防止中文乱码
            if(typeof obj=="string"){
                var reg = new RegExp("(^|&)"+ obj +"=([^&]*)(&|$)");
                var r = window.location.search.substr(1).match(reg);
                if(r!=null)return  unescape(r[2]); return null;
            }else if(typeof obj=="undefined"){
                var searray = search.split("&");
                var obj = {}
                searray.map(function (item) {
                    var sarry = item.split('=');
                    obj[sarry[0]] = sarry[1];
                })
                return obj;
            }

}

// getParameters();
//  getParameters('tn');

Not satisfied that you are not thinking about again I do not want to get a do not want to get all, I wanted to get a few of them do?

How about you make me so love to meet you.

So the final code has become such

function getParameters(obj) {//获取地址栏参数不包括hash值
            var search = decodeURI(location.search).replace('?', '');//防止中文乱码
            if(typeof obj=="string"){
                var reg = new RegExp("(^|&)"+ obj +"=([^&]*)(&|$)");
                var r = window.location.search.substr(1).match(reg);
                if(r!=null)return  unescape(r[2]); return null;
            }else if(typeof obj=="undefined"){
                var searray = search.split("&");
                var obj = {}
                searray.map(function (item) {
                    var sarry = item.split('=');
                    obj[sarry[0]] = sarry[1];
                })
                return obj;
            }else if(obj.constructor ==Array){
                var searray = search.split("&");
                var fromarray = {}
                searray.map(function (item) {                 
                    var sarry = item.split('=');
                     if(obj.indexOf(sarry[0])>-1){
                          fromarray[sarry[0]] = sarry[1];   
                     }

                })
                return fromarray;
            }

}

// getParameters();
//  getParameters('tn');
 //getParameters(['tn','wd']);

muah.