image auto resizing

can anyone help me with this code, i dnt know where to modify this so that it auto resizes the background image to the users current screen resolution.

Heres the code:

<div align=left><div style=”position: center; width: 470px; height: 450px; overflow: auto; height:500px; BACKGROUND-

COLOR: #F58152; FILTER: alpha(opacity=45); border: yellow; margin-right=400px”>

<style type=”text/css”>
/*
Footer Remover – xanga.com/add_ons
*/
table.footer, table.footernav {display: none;};
</style>

<style type=text/css>
texttable.left, td.mainleft, table.left, table.navigation, table.search{display:none}
table.blogbody tr td {width:0px; padding: 0px;}
</style>

<!– Custom Colored Scrollbars : blogring–>
<style type=”text/css”>
<!–
BODY {
background-image: url([url]http://www.lucianaariyoshi.hpg.ig.com.br/wallpapers/doasinfinity01.jpg[/url]);
background-repeat: no-repeat;
background-position: bottom right;
scrollbar-face-color: FFFFF;
scrollbar-shadow-color: white;
scrollbar-highlight-color: white;
scrollbar-3dlight-color: 000000;
scrollbar-darkshadow-color: 000000;
scrollbar-track-color: black;
scrollbar-arrow-color: solid gray;
–>
</style>
<!– End Script: blogring–>

<style type=”text/css”>
/* Jang Nara Stylesheet */
/* by Angela (xanga.com/ibcykoei) */
/* [url]http://blogring[/url] */

div.blogheader, .caption {
/* edits the dates */
font-family:arial;
text-transform:uppercase;
font-size:12px;
line-height:10px;
font-weight:bold;
color:#000000;
letter-spacing:0px;
background-color: F58152;
text-align: center;
}

a:link, .footernav.link, a.footernav:link, a.footernav:active {
/* edits all links */
color:#F58152;
text-decoration: none;
}

a:visited, a.footernav:visited, {
/* edits the links that the user has visited */
color:#F58152;
text-decoration: none;
}

a:hover {
/* edits when user mouseovers the links */
color:#C0C0C0;
cursor: crosshair;
text-decoration: none;
}

input, select, textarea, .textfield, .button {
/* this edits the buttons, dropdowns, etc. */
border: 1px gray;
font:normal 11px arial;
background-color: #FFFFFF;
letter-spacing:0px;
color: black;
}

table.blogbody {
/* this edits the other the place where the blog is */
border: 0px solid white;
background-color: #000000;
width:300px;
}

</style>

thanx in advance!

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