Auto-Format Input Text?

I have some input text fields (by the text tool, not the component) in my form that I was wondering if they could be auto-formatted. I was looking specifically for dates & numbers. For example when the user inputs 082606 and then tabs away it would immediately update to 08/26/06, or when the user inputs 50000 it would immediately update to 50,000. Any suggestions on how to do this would be greatly appreciated! Thanks!!