Module模式

<script>
var myModel=(function(){
var model={};
var privateVar="Hello World";
function privateMethod()
{
privateVar="Hello World!!";
};
model.publicVar="Aven";
model.publicMethod=function()
{
privateMethod();
console.log(privateVar);
};
return model;
})();
myModel.publicMethod();
</script>

(function()
{
    var myQuery=(function()
    {
        var _myQuery={};
        _myQuery.queryElementById=function(id)
        {
            console.log('QueryElementById:'+id);
        };
        return _myQuery;
    })();
window.myQuery=window._=myQuery;
})();

_.queryElementById('#qryBtn');