Display all fields read only in Dynamics CRM Forms

We used javascript to make all fields read only in the MS CRM Forms. We bind the script and on Form "onload event". After "save&Publish" the form.


 function disableAllFields()
 {
   debugger;
    Xrm.Page.ui.controls.forEach(function (control, i) {
    if (control && control.getDisabled && !control.getDisabled()) {
             control.setDisabled(true);
             alert("Hi");
}
        });
 }

we displayed all read only fields in the form