[jQuery] define and invoke class inside $(document).ready

[jQuery] define and invoke class inside $(document).ready


Is that a correct way to create class utilizing jQuery?
var myClass = null;
$(document).ready(function(){
    function MyClass(){
        this.imagesHolder = null;
    }
    MyClass.prototype.init = function (){
        this.imagesHolder = jQuery("#imgs");
    }
myClass = new MyClass();
});