Update validation summary in 'real time'

Hi I am using MVC4 with client side validation. This works great for showing validation messages next to the fields.

I have added a validation summary:

 @Html.ValidationSummary(false)

This works, client side 'n all. I would like it to behave differently though; currently the messages in the validation summary only change when the submit button is clicked. I would like them to be dynamically, populated in a similar fashion to each field's validation message.

Can someone suggest a way to achieve this ?

Any information on what triggers the summary update would be great.