select contents when in focus

Hello,

I have a list page in spreadsheet mode. This page is used on a tablet device. When the user "clicks" (or touches, in this case) in a text field I'd like to select the contents of that field. This is so they can edit it without needed to backspace to delete the contents. I imagine this might be accomplished with a field event, but I haven't been able to figure it out.

Any tips?

Thanks,
Tim