Dynamically changing the label of a field

A question came up on the CRM forums and I thought I'd so a quick article on it.

In order to change a fields label, we need to modify the fieldname_c.innerText property. Take for example the following example where we have 'Project Category' and 'Project Manager' attributes:

Now for the sake of argument, say I want to rename my 'Project Manager' attribute based upon the option selected in the 'Project Category' attribute. I would have to put the following code in to the form's onLoad and attributes onChange events:

//only do something if there is data in the attribute
if (crmForm.all.new_projectcategory.DataValue != null) {
    //get the attribute value
    var pCat = crmForm.all.new_projectcategory.DataValue;

    //work through the values
    switch (pCat) {
        case "1": crmForm.all.ownerid_c.innerText = "Project Manager";
            break;
        case "2": crmForm.all.ownerid_c.innerText = "Project Administrator";
            break;
    }
}

Eureka! Now when I set my Project Category value, I get different names on the Owner attribute label...