Hiding Navigational Items based on drop down value

We had a request were based on a drop down value the navigational structure must show certain options based on the drop down value on the record.
Shawn Redmond

hideNavBarItemByName("Details:", "Divisions");

If (crmForm.all.fieldname != 3)
{
hideNavBarByItemName(‘Details’, ‘Value1');
hideNavBarByItemName(‘Details’, ‘Value2');

}

hideNavBarItemByName = function( sectionName, itemName )
{
setNavBarItemVisibilityByName(sectionName, itemName, false);
}

setNavBarItemVisibilityByName = function( sectionName, itemName, visible )
{
var groups = document.getElementById("crmNavBar").childNodes;

if( groups != null )
{
for( var i = 0; i < groupname =" groups[i].childNodes[0];" items =" groups[i].childNodes[1].childNodes;" n =" 0;" item =" items[n];" display =" visible">