Overlay form using css on a webpage
I'd like to have a form displayed on a webpage when the page loads. The form should overlay the normal page with the background being somewhat washed out. If the viewer either submits the form or x's out of it, the page should display normally. I'm somewhat familiar with css, but not for something this complicated. I'm no artist, but have attached a jpg graphic to give you and idea of what I would like the page to look like when it loads. Can someone please help with the coding?
Thanks in advance.