How to show 3D object on WebSite

I want to show 3-D objects on my web-site and there should be a user control to rotate that object. Also there is a need to give a control to set dimensions of that object with respect to X-axis, Y-axis as well as Z-axis.
I am using ASP.NET with C#.
Can anyone give me pointers that what should I do?
Which libraries should I use ?
I don't want to use SilverLight or WPF.