Answers for "js add new attribute to object"

javascript add attribute

var element = document.getElementById('btnBuild');
element.setAttribute("disabled", "disabled");

how to add property to object in javascript

var data = {
    'PropertyA': 1,
    'PropertyB': 2,
    'PropertyC': 3
};

data["PropertyD"] = 4;

// dialog box with 4 in it
alert(data.PropertyD);
alert(data["PropertyD"]);