query.js

var MYAPP = {};

MYAPP.util = {
    getData: function ( arg ) {
        var query_string = window.document.location.href.split('?')[1];
        var datas = query_string.split('&');
        var tmp, result, i;
        for(i=0; i<datas.length; i++) {
            tmp = datas[i].split('=');
            result[tmp[0]] = tmp[1];
        }
        return result;
    }
};

MYAPP.example = {
    getTest: function ( arg ) {
        var data = MYAPP.util.getData();
    }
}

$(document).ready(function(){
    MYAPP.example.getTest();
});