salve ragazzi ho trovato un layout fatto con i css; adesso dovrei modificarlo affichè la pagina occupi tutta la finestra del browser e nn so come fare.
Il codice è il seguente:

codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Dynamic Drive: CSS Liquid Layout #2.1- (Fixed-Fluid)</title>
<style type="text/css">

body{
margin:0;
padding:0;
line-height: 1.5em;
}

b{font-size: 110%;}
em{color: red;}


#topsection{
background: #EAEAEA;
height: 90px; /*Height of top section*/
}

#topsection h1{
margin: 0;
padding-top: 15px;
}

#contentwrapper{
float: left;
width: 100%;
}

#contentcolumn{
margin-left: 200px; /*Set left margin to LeftColumnWidth*/
}

#leftcolumn{
float: left;
width: 200px; /*Width of left column*/
margin-left: -100%;
background: #C8FC98;
}

#footer{
clear: left;
width: 100%;
background: black;
color: #FFF;
text-align: center;
padding: 4px 0;
}

#footer a{
color: #FFFF80;
}

.innertube{
margin: 10px; /*Margins for inner DIV inside each column (to provide padding)*/
margin-top: 0;
}

</style>

<script type="text/javascript">
/*** Temporary text filler function. Remove when deploying template. ***/
var gibberish=["This is just some filler text", "Welcome to Dynamic Drive CSS Library", "Demo content nothing to read here"]
function filltext(words){
for (var i=0; i<words; i++)
document.write(gibberish[Math.floor(Math.random()*3)]+" "
}
</script>

</head>
<body>
<div id="maincontainer">

<div id="topsection"><div class="innertube"><h1>CSS Liquid Layout #2.1- (Fixed-Fluid)</h1></div></div>

<div id="contentwrapper">
<div id="contentcolumn">
<div class="innertube">Content Column: Fluid <script type="text/javascript">filltext(45)</script></div>
</div>
</div>

<div id="leftcolumn">
<div class="innertube">Left Column: 200px <script type="text/javascript">filltext(15)</script></div>

</div>

<div id="footer">Dynamic Drive CSS Library</div>

</div>
</body>
</html>
Cosa posso modificara?
Grazie mille