How to disable save buttons on MS CRM form

Disable 'Save':

document.all._MBcrmFormSave.style.display='none'; 

Diable 'Save and Close':

document.all._MBcrmFormSaveAndClose.style.display='none'; 

Disable 'Save and New':

document.all._MBcrmFormSubmitCrmForm59truetruefalse.style.display='none';