Hi, house,
This is how i do it, hope it can help you.
First create a 1x1 pixel images with black color (example),
then in your html or asp page.. call the image and define the width/length of the bar
<Img src="black.gif" width=100 height=2>
Using ASP you can also make this lenght dynamic.
<img src="black.gif"
width=<%=barlength%>
height=<%=barheight%>
>
Pepper