MSCRM 4.0: Disable All Fields on a CRM Form Tab

There has been a question on CRM Development Forum about how to make all CRM fields read only on a CRM form tab. Here is the script that I just came up.

/**
 * Disable all CRM fields on a CRM form's tab.
 * @author Daniel Cai, http://danielcai.blogspot.com/
 *
 * Parameters:
 * @param tabIndex: The index number of the tab that you want to disable the 
 *                  CRM fields. It's a zero-based number. 
 */
function disableTab(tabIndex) {
    var tab = document.all["tab" + tabIndex];

    for (var i = 0; i < tab.all.length; i++) {
        if (tab.all[i].Disabled !== undefined) {
            tab.all[i].Disabled = true;
        }
    }
}

To use the function, you simply call it with the tab's index number as the single parameter, e.g.

disableTab(2); // Disable all CRM fields on the third tab

Have fun.