Salve a tutti provo a visualizzare il div con immagine pre load ma nulla qualcuno sa dire dove è l'errore, il codice è:
codice:
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">


<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
div. background
{
width:1000px;
height:1500px;
background: url(3.gif) repeat;
border: 2px solid black;
}
div.transbox
{
width:400px
height:180px
margin:30px 50px
background-color:#ffffff;
border: 1px solid black;
opacity:0.6;
filter:alpha(opacity=60);
}
</style>
<title>Untitled Document</title>
<script language=javascript>
function controllo()
{
for (i=0; i<5000; i++){
document.getElementById("divisio").style.visibility== "visible;";
document.getElementById("divisio2").style.visibility== "visible";
}
document.form1.submit();
}
</script>
</head>
<body bgcolor="#FFFFFF"><div  id="divisio" class="background" style= "visibility: hidden;"><div id="divisio2" class="transbox" style= "visibility: hidden;">
<table width="85%" border="0" align="center" height="479"> <tr> <td width="11%" background="images/bg-bo.gif" HEIGHT="310"></td><td width="77%" HEIGHT="310"> 
<table width="87%" height="133%" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" align="center"> 
<tr> <td height="434"> <form  method="post" action="disponibilita2.asp" name="form1" onSubmit="return controllo()" > 
<table width="105%" height="10%" border="0" bordercolor="#CCCCCC" bgcolor="#CCCCCC" cellpadding="0" cellspacing="0"> 
<tr bordercolor="#FFFFFF"> <td height="231" bgcolor="#FFFFFF" bordercolor="#333333"> 
<div align="center"><TABLE WIDTH="100%" HEIGHT="66%" BORDER="0" BORDERCOLOR="#FFFFFF" BGCOLOR="#FFFFFF"> 
<TR> <TD WIDTH="4%" HEIGHT="26" BORDERCOLOR="#666666" BGCOLOR="#FFFFFF"></TD><TD WIDTH="4%" ALIGN="center" VALIGN="middle" ROWSPAN="2" BGCOLOR="#FFFFFF" BORDERCOLOR="#666666"></TD><TD COLSPAN="3" HEIGHT="38" BORDERCOLOR="#666666" BGCOLOR="#FFFFFF" ROWSPAN="2"><TABLE WIDTH="98%" BORDER="0" HEIGHT="156"><TR><TD WIDTH="44%"><DIV ALIGN="CENTER"></DIV></TD><TD WIDTH="4%"></TD><TD WIDTH="12%"></TD><TD WIDTH="2%"></TD><TD WIDTH="12%"></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR><TR><TD WIDTH="44%"><SELECT NAME="select1" onchange="controllo()";"><OPTION>...................................................</OPTION><OPTION VALUE="gen">gennaio</OPTION><OPTION VALUE="feb">febbraio</OPTION><OPTION VALUE="mar">marzo</OPTION><OPTION VALUE="apr">aprile</OPTION><OPTION VALUE="magg">maggio</OPTION><OPTION VALUE="giu">giugno</OPTION><OPTION VALUE="lug">luglio</OPTION><OPTION VALUE="ago">agosto</OPTION><OPTION VALUE="sett">settembre</OPTION><OPTION VALUE="ott">ottiobre</OPTION><OPTION VALUE="nov">movembre</OPTION><OPTION VALUE="dic">dicembre</OPTION></SELECT></TD><TD WIDTH="4%"></TD><TD COLSPAN="3"><DIV ALIGN="CENTER">stanze</DIV></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR><TR><TD WIDTH="44%"><DIV ALIGN="LEFT"></DIV></TD><TD WIDTH="4%"></TD><TD COLSPAN="3"><DIV ALIGN="CENTER"></DIV></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR><TR><TD WIDTH="44%"></TD><TD WIDTH="4%"></TD><TD COLSPAN="3"><DIV ALIGN="CENTER"></DIV></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR><TR><TD WIDTH="44%"></TD><TD WIDTH="4%"></TD><TD WIDTH="12%"></TD><TD WIDTH="2%"></TD><TD WIDTH="12%"></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR><TR><TD WIDTH="44%"></TD><TD WIDTH="4%"></TD><TD COLSPAN="3"><DIV ALIGN="CENTER"></DIV></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR><TR><TD WIDTH="44%"></TD><TD WIDTH="4%"></TD><TD WIDTH="12%"></TD><TD WIDTH="2%"></TD><TD WIDTH="12%"></TD><TD WIDTH="5%"></TD><TD WIDTH="21%"></TD></TR></TABLE></TD><TD ROWSPAN="2" WIDTH="1%" BGCOLOR="#FFFFFF" BORDERCOLOR="#666666"></TD></TR> 
<TR> <TD WIDTH="4%" HEIGHT="244" BORDERCOLOR="#666666" BGCOLOR="#FFFFFF"></TD></TR> 
</TABLE></div><div align="center"></div></td></tr> </table></form></td></tr> 
</table></td><td width="12%" background="images/bg-bo.gif" HEIGHT="310"></td></tr> 
</table></div></div>
</body>
</html>
grazie in anticipo