How do I creat a page to expand and contract ie so my main page always stays in the middle of the monitor or moves about on my background page.
Do not know if I have explained this right.

best way is to use CSS but if you don't want to use CSS you could put the page into a table and centre the table.

CSS could look like the example below:

body {
margin:50px 0px; padding:0px;
text-align:center;
}

#Content {
width:500px;
margin:0px auto;
text-align:left;
padding:15px;
border:1px dashed #333;
background-color:#eee;
}