Read-only Combobox with ZK Framework

Why the Combobox components, when read only, don't allows the user s开发者_StackOverflowelect a option with the Page Down\Page Up keys? How to enable this feature?

Lucas, what version of ZK are you using? A readonly textbox in both the latest version 5.0 and 3.6.3 both allow this.

<textbox value="Hello"  Readonly="true" />

See Zk Fiddle Combobox

It is working fine with

readonly="true"

You can use up and down arrow keys yo select an option in Combobox.