centering css PS ouptut

[itsglitzy]

hi all i am new to css, so have output my my design using photoshop
which generates the css (great) but when i get it to dreamweaver the file is absolute, how would i get it to be centred and remain centred when the user moves the page (the old was in your rable tag "align = "centred"" woul do this

[CyberGuy]

try this

body{
text-align:center;
margin:0 auto;
}
good luck