I wanted to override the main background image on certain pages of my site so I tried to use the following in an html block, but it doesn't do anything. I'm pretty new at designing web pages and was looking for a little help. is it possible to override the main css without creating single pages?

<style="text/css">
body{
background-image:url(images/123.jpg);
background-repeat:no-repeat;
}
</style>

I have even tried the absolute address and it still doesn't work

------------------------------------------

after a little more research, I found another post that helped me solve this