Displaying CRM 4.0 form field and tab

Here is the blog post if you want to hide the fields

To display a CRM form field, the below scripts must be used:

crmForm.all.new_field_c.style.display = "inline";

displays the label and

crmForm.all.new_field_d.style.display = "inline";

displays the TextBox.

Similarly to display a tab use

crmForm.all.tab1Tab.style.display = "inline";

Note: These are unsupported customizations.