CRM 2013 Account Active / Deactivate Issue

At the time of Activate account I want to disable all check-boxes. We have tried to put below code and though its not working.

Would you please let me know is there any other way we can do this?

if (saveMode == "6") {
if (Xrm.Page.ui.getFormType() == 4) {
Xrm.Page.ui.controls.get("new_xyz").setDisabled(true);

 Xrm.Page.getAttribute("new_xyz").setSubmitMode("always");

}

}

Thanks,

Vaibhavi P.