It keeps repeating, I have no idea why.

You can use CSS:

body
{ background: #000000;
background-image: url(nameofpic);
background-repeat: no-repeat; }

if that does not work, try using this code in your body tag. bgproperties="fixed"

if that does not work, try using this code in your body tag. bgproperties="fixed"
that does not prevent repeating.
it makes the background stationary.

oops, sorry, but if the background repeats downwards, you could use that.

Thank you for all the help :)