Change Ids by class

[cebola]

I need change all IDs of elements that set class is = 'test'
how to do this?

[Animal]

It's what DomQuery was made for. Try this:

    Ext.get(document.body).select(".test").each(function(el) {
        el.dom.id = // whatever you want
    });

[cebola]

Tanks animal.