Get array from url with JavaScript

I have Url with parameters i can get all parametrs except
arrays this is my url
decoded:

name=myname&type=Restaurant
            Cuisine Moderne / Créative&heure=06 :00 - 06
            :30&nbrPers=10&service[]=Canbeprivatized&service[]=Englishspoken&service[]=Françaisparle&option[]=Check&option[]=CreditCard&typeProfile=Amateur

And
this is my JavaScript
function:

function
            getUrlParameter(sParam) {
 var sPageURL
            =decodeURIComponent(window.location.search.substring(1));
 var sURLVariables =
            sPageURL.split('&');
 for (var i = 0; i < sURLVariables.length; i++)
            {
 var sParameterName = sURLVariables[i].split('=');
 if
            (sParameterName[0] == sParam) {
 return sParameterName[1];

            }

            }
}

alerts
for test:

var name =
            getUrlParameter('name');
 alert("name ;"+name);// show : myname
var
            service= getUrlParameter('service[]');
 alert("servoce:"+service);// show
            :only "Canbeprivatized" i cant get the others
            service[]

How can i
get all service[] and option[]
??