I have a TabStrip that triggers a javascript function when an item is clicked. The javascript function is meant to execute a CallbackPanel. It worked fine with version 3.5 of the .Net Framework, but when I moved to 4.0, it stopped working. In fact, it seems that any instance of a CallbackPanel executed via javascript isn't working. Do you know why? Here is a stripped down version of the javascript function:

function TabStrip1_ItemClick(e, info) {
var CallbackPanel = eo_GetObject('CallbackEditor1');
CallbackPanel.execute();
}

I also tried it like this:

function TabStrip1_ItemClick(e, info) {
var CallbackPanel = eo_GetObject('<%= CallbackEditor1.ClientID %>');
CallbackPanel.execute();
}

Thank you.