Hum, I can retrieve the active item in the shuttle list :
document.getElementById('chartSettingsForm:parametersListShuttle').component.sourceList.activeItem
So, I looked in the API, and there is a setActiveItem, but I cannot make it work :/
I tried document.getElementById('chartSettingsForm:parametersListShuttle').component.sourceList.setActiveItem('myStringInTheShuttleList'), or .setActiveItem('chartSettingsForm:parametersListShuttle:3') but doesn't seem to work
It seems to be easy :/ There is no example with the activeItem attribute of the shuttle list , and I do not now how to use it to set an active item.