JS oop objects properties, prototype sample

function Widget(size,containerId,html,rowNumber){
 this.size = size;
 this.containerId = containerId;
 this.container = $(this.containerId);
 this.html = html;
 this.rowNumber = rowNumber;
 this.rowId = 'row' + this.rowNumber;
}
Widget.prototype = {
 render: function(){
 this.row = $('#' + this.rowId);
 var div = $('<div></div>').addClass('col-md-' + this.size).text(this.html);
 
 if(!this.row.length){
 this.row = $('<div></div>').addClass('row').attr('id', this.rowId);
 this.container.append(this.row);
 }
 this.row.append(div);
 }
}
var widgets = [];
widgets.push(new Widget(5,'#container','vjvjy',2));
widgets.push(new Widget(3,'#container','343456',1));
widgets.push(new Widget(3,'#container','343456',2));
function Render(){
 for(var i = 0; i< widgets.length;i++){
 widgets[i].render();
 }
};
$(document).ready(Render)