Div layout

[Swinkid]

Hey all,
I want to center my Div layouts boxes, but every time i do, they go out of place like:
http://www.habbocafe.com/SITE/index.php

The only way i get them into place is to have this CSS:

body {
  margin: 10px;
  padding: 0px;
}
#container {
  width: x-pixels;
  height: auto;
  margin: auto;
}
#marquee{
  background: #0099FF;
  width: 800;
}
#header {
  background: #0f0;
  width: 800;
}
#leftcol {
  background: #f00;
  width: 200;
  background-position: left;
  text-align: left;
}
#content {
  background: #fff;
  width: 600;
  background-position: center;
  text-align: center;
}
#footer {
  background: #0f0;
  clear: both;
  width: 800;
}body {
  margin: 10px;
  padding: 0px;
}
#container {
  width: x-pixels;
  height: auto;
  margin: auto;
}
#marquee{
  background: #0099FF;
  width: 800;
}
#header {
  background: #0f0;
  width: 800;
}
#leftcol {
  background: #f00;
  width: 200;
  float: right;
}
#content {
  background: #fff;
  width: 600;
  float: center;
}
#footer {
  background: #0f0;
  clear: both;
  width: 800;
}

While having my contain box aligned to the left or removing it. But it aligns them to the left.
Note: the container is doing nothing atm

[Meti]

"The only way i get them into place is to have this CSS:"

Do it then.

[Excellent]

floateft;

[Swinkid]

Do it then.

I ment only by aligning them to the left. sorry.

floateft;

Well spotted, typed out wrong, but even if i done that it still wouldn't align propley.

[Excellent]

How about changing the container width to 800px; instead of x-pixels?

[Swinkid]

How about changing the container width to 800px; instead of x-pixels?

That done the trick, thank you + rep.

[Excellent]

No problem Any other help just PM me.