How do I dynamically rewrite a vbs ASP page without reloading the whole thing?

Hi Experts

I have a quick and dirty vbs asp page which creates my grid layout to display some dynamic data

I expect to use js GetElementByID to set the value of each element from the variables I will receive from the server at regular intervals

The thing that's making my hair itch is I have no clue how to implement the calls to the server to get the data WITHOUT reloading the whole page. I want this layout to appear static and not have to reload itself (otherwise I could just have the vbs create the html on the fly from the source data serverside)

The reason for this is that it's some pretty hefty WMI data, and takes a couple of seconds to poll for it, yet I want my page to look smooth, and only the displayed data within it to change

All I want the periodic script to do using a setTimeout timer is get a bunch of data from the server(this data changes all the time), and write the values in the corresponding element

The vbs to get/create the data is already done
The js to write a variable to an html element is straightforward

I just need the bit in the middle...  :P