What format and how many colors do you have it saved in?? These are two things you can do quickly to get your images smaller and load faster.
If you have an image saved in BMP format, you can save it as GIF or JPG format. GIF is a bit smaller, but the quality can also suffer because of the format. Try both and see what you get.
Likewise, if your image is set to 16 million colors, you probably don't need to have that many colors in the images pallate. Reduce the colors (this can be done in PSP or Photoshop easily) to the fewest number of colors without hurting the image quality.
Both of these things will help you shrink the size of your image. Another option if you don't feel too comfortable with image manipulation is to go to http://websitegarage.netscape.com/ and use their "GIF Lube" which will optimize any image. That service is nice because it will show you multiple versions of your image with the different optimizations they do and let you choose which one works best for you.
Hope this gets you what you want.
Thanks Dave, the format is already jpg, I tried the web site you told me but after that the size still the same. If I put some color light to have the pics realy clear, is ti will change the size? My goal is to use this jpeg as backround for my web site, but I want to use just one clear picture for all the backround not a mosaic.
to make the pict not tiled enter this scipt:
document.body.style.cssText="background:white url(whatever.gif) no-repeat fixed center center"