How to design a site with a background image?

Hello. I want to design a site(most likely w/ a 960 or so(maybe smaller) width), and have a background image like the one on this site 7days7nights.com ... How do I do that? ALLLLLL Suggestions And Recommendations appreciated!!!

 

Using HTML code for background. But if you use large image as background it will load slowly.
So we use CSS for repeating a image for the total website. So that it will load faster.

 

For the main background add this to css :
body{
background: url('main_bg.jpg') fixed #000;
}
For the box background, create a 5X5 px image and try using a brush of size 2px and create a random pattern. Then use the following code in css :
box{
background: url(bg_box.jpg) #000 repeat;
}