In CRM, I have a field that allows the user to select from a set of Picklist values.  One of the values is no longer active.  I did not want to delete the Picklist value and lose historical data, but I did not want users to be able to select that value for new Opportunities.  This functionality is very easy to apply on the client-side of the CRM form.

In the following example, the “Form_onload” function is wired up to the CRM form onload event.

function Form_onload() {

function HandleBusinesUnitValues() {
try {
// Check to see if the value we want to remove is the value that is currently selected.
// We will only remove the value from the picklist if it is not selected.
var wdc = ‘8’;
var currentValue = Xrm.Page.getAttribute(“crm_picklist_field_name”).getValue();
currentValue = currentValue == null ? ” : currentValue ;
if (currentValue != wdc) {
var pickListField = Xrm.Page.getControl(“crm_picklist_field_name”);
catch (Exception) { }