<input name = "role_name" id = "role_name" value="Roy" disabled>
<input name = "role_id" id = "role_id" hidden value="3312">

<input name = "role_name" id = "role_name" value="Roy" disabled = "disabled">
<input name = "role_id" id = "role_id" hidden = "hidden" value="3312">

$("#role_name").removeAttr("disabled");
$("#role_id").removeAttr("hidden");

$("#role_name").prop("disabled",false);
$("#role_id").prop("hidden",false);