title: Hide and display a picklist on onchange of lookup
body: <p>I have one field on Form of MS CRM 4, which should be hidden by default and should only be visible on selecting a specific value of lookup</p>
  
  <p>I used crmForm.all.gsk_roles_c.style.display = '' on onchange event of lookup</p>
  
  <p>The issue is field is hidden but values are still populating on screen without onchange event </p>