can you resize a full background image on an HTML/CSS website?...

... one of my students wanted to know last week. Well, seems that you can:
And you can see a demo of it in action here:

Apparently this works with just a few lines of code which you insert directly into the CSS:

#img.source-image {
width: 100%;
position: absolute;
top: 0;
left: 0;
}

Very very nice indeed! Lots and lots of other really cool code snippets (as they call them over there) to check out on their huge site. So, thank you Chris Coyier and CSS-Tricks!

 Note:  I have been thinking, and in order for this to give a good result your image aspect ratio would need to be 4 x 3 so that it reaches down effectively at sizes like 1024 x 768 or 1600 x 1200. However the width would need still need to be 1920 so that it also stretches to 1920 x 1080. Which makes the vertical value 1440. So, 1920 x 1440 is what you need. Which is pretty big and may be difficult to bring down to 300KB, which is the limit on blogspot background images. Read more on browser sizes and background images here  ) 

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