Setting field focus after javascript alert not working in MS CRM

Question

I have the following code in the OnChange() event for a field.

alert("alert text");
crmForm.all.fieldname.SetFocus();

The page acts like the SetFocus call isn't even there.

Anyone know why this is?

EDIT: I've also tried the following to no avail.

crmForm.all.fieldname.Focus();
crmForm.all.fieldname.focus();
alert("alert text", function() { crmForm.all.fieldname.SetFocus()});

Answer 1

In the DOM, the function to set focus on an element is called focus(), not SetFocus().

Answer 2

Turns out that retaining focus on the field from which the OnChange() method was called is broken in CRM 4 without the most recent rollup. This is a known issue with a Microsoft KB article.

To achieve the illusion of retaining focus on the field simply set the focus to a different field on the same tab first and then reassign the focus to the field from which the OnChange() event was called like so:

alert("alert text");
crmForm.all.some_other_field_on_the_same_tab.SetFocus();
crmForm.all.fieldname.SetFocus();