Making a web site background in Photoshop
1. Create a new image at 2×2 pixels in white.
2. With the pencil tool, make a 1 pixel dot at the top left corner and another one at the bottom right corner of the image in the colour that you want to make semi transparent.
3. Define the image as a pattern.
4. Create another new image in white at 50×50 pixels.
5. Fill it with the pattern you just made.
6. Save for the web as a .gif and make the white pixels transparent.
7. Save the image. You just got yourself a semi-transparent background image.
To incorporate the background, just add the following line into your stylesheet:
background: transparent url(imagename.gif);
