ajax.js

var url = 'http://ms1.agentgrid.net/api/tagnet/service_levels?'
var query = 'PartnerID=2&ServiceLevel=Basic%201';

var options = {
        type: 'GET',
        url: url+query,
        dataType: 'json',
        success: success,
        error: error
    };
   
    function success(res){
        //handle JSON
    }
    function error(err){
       //handle error
    }
    $.ajax(options);