Stop tab Index focus

HTML

<div id="buttonArea" style="width:100%;height:100%; ">
    <button id="NextBtn">Next</button>
    <button id="CancelBtn">Cancel/Close</button>
    <button id="APSaveBtn">Save</button>
</div>

JavaScript

$(document).on('keydown', function(event) {
    if (event.keyCode == 9) {   //tab pressed
        event.preventDefault(); // stops its action
    }
});