Create a number entry that jumps to another section when characters are filled

I am looking to create a section in a form that once the characters are filled it jumps to the next section. I am looking for it to fit the breakdown below, where x is a character entered:

xxx - xx

I am not looking to make this multiple fields, just to have this section technically one answer with a dash or space between it.

Add our Text Box field and enable Input Mask:

You can also use the following widget:

http://widgets.jotform.com/widget/masked_input

http://widgets.jotform.com/widget/fixed_format

Here's how to add a widget in your form: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form. 

Thanks