I need help in ExtJS 2.3. I am unable to get success for autoComplete = false.
I want to false autoComplete for all form in ExtJS 2.3.
this.tabs.rateQuoteTab.on('render', function (cmp) {
if (cmp && cmp.el && cmp.el.dom) {
cmp.el.dom.autocomplete = 'off';
}
})

I will try to help you without example but please, if this don't help you, give me exemple of you'r code.
So, if you really want to set false autoComplete of ALL YOU'R FORMS you can override the class.
Here is link to the override method of ExtJS 2 : https://docs.sencha.com/extjs/2.3.0/#!/api/Ext-method-override
But i think is not a good idea. ExtJS is OOP so you just have to create a new xtype extend formpanel and this new xtype have the autoComplete automaticaly false.
Have a nice day.