outlook like desktop pop up alert

Hi,

First off, I'm kind of new to .Net tech.

I have a internal web application where user log in & assign a work order to another user if there is any.

so, What i'm trying to do now is create a like a OUTLOOK pop up email alert thing for each user where they can preview their work order instead of refreshing page to see if they got any new work order.

How would go about it?

Thanks in advance,

saq