Get informations from website

Hello,

We have one ashx - html page, hostet on IIS 7.5 Website with windows authentication.

This site has informations, you can see it at the picture:

My question:

How can I open this ashx site in background and get this values to a variable?

I don't have no approach now, how can I do this with powershell?

I hope somebody can help me,

Thanks Horst MOSS 2007 Farm; MOSS 2010 Farm; TFS 2010; IIS 7.5