On Quotes, Orders, and Invoices you may want to remove the ability for users to interact with Write In Products. In our integration with SL we are unable to deal with these because Dynamics SL Order Management does not support write ins.

So here is the On Load jscript to remove it from the wonder bar:

function leftNavRemove(lNav)

{

var lNavItem = document.getElementById(lNav);

if (lNavItem != null)

{

lNavItem.parentNode.style.display ='none';

}

}

leftNavRemove('navWriteInProducts');

Shout out to – Customer Connect for the Blog Pointer. 

http://www.askcrm.com/Default.aspx?tabid=866&EntryID=80