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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Documento senza titolo</title>
</head>
<body>
<script type="text/x-javascript">
function venditanoleggio(){
if(document.getElementById('vendita').checked==true){
document.getElementById("prezzo").innerHTML = "";
document.getElementById('prezzo').options[0]=new Option("5","5",false,false);
document.getElementById('prezzo').options[1]=new Option("6","6",false,false);
document.getElementById('prezzo').options[2]=new Option("7","7",false,false);
document.getElementById('prezzo').options[3]=new Option("8","8",false,false);
document.getElementById('prezzo').options[4]=new Option("9","9",false,false);
document.getElementById('prezzo').options[5]=new Option("10","10",false,false);
} else
if(document.getElementById('noleggio').checked==true){
document.getElementById("prezzo").innerHTML = "";
document.getElementById('prezzo').options[0]=new Option("1","1",false,false);
document.getElementById('prezzo').options[1]=new Option("2","2",false,false);
document.getElementById('prezzo').options[2]=new Option("3","3",false,false);
document.getElementById('prezzo').options[3]=new Option("4","4",false,false);
document.getElementById('prezzo').options[4]=new Option("5","5",false,false);
} else
/* if(document.getElementById('vendita').checked =true ; || document.getElementById('affitto').checked)*/
if((document.getElementById('vendita').checked==true) && (document.getElementById('noleggio').checked==true))
{
document.getElementById("prezzo").innerHTML = "";
document.getElementById('prezzo').options[0]=new Option("1","1",false,false);
document.getElementById('prezzo').options[1]=new Option("2","2",false,false);
document.getElementById('prezzo').options[2]=new Option("3","3",false,false);
document.getElementById('prezzo').options[3]=new Option("4","4",false,false);
document.getElementById('prezzo').options[4]=new Option("5","5",false,false);
document.getElementById('prezzo').options[5]=new Option("6","6",false,false);
document.getElementById('prezzo').options[6]=new Option("7","7",false,false);
document.getElementById('prezzo').options[6]=new Option("8","8",false,false);
document.getElementById('prezzo').options[6]=new Option("9","9",false,false);
document.getElementById('prezzo').options[6]=new Option("10","10",false,false);
} else {
document.getElementById("prezzo").innerHTML = "";
document.getElementById('prezzo').options[0]=new Option("1","1",false,false);
document.getElementById('prezzo').options[1]=new Option("2","2",false,false);
document.getElementById('prezzo').options[2]=new Option("3","3",false,false);
document.getElementById('prezzo').options[3]=new Option("4","4",false,false);
document.getElementById('prezzo').options[4]=new Option("5","5",false,false);
document.getElementById('prezzo').options[5]=new Option("6","6",false,false);
document.getElementById('prezzo').options[6]=new Option("7","7",false,false);
document.getElementById('prezzo').options[7]=new Option("8","8",false,false);
document.getElementById('prezzo').options[8]=new Option("9","9",false,false);
document.getElementById('prezzo').options[9]=new Option("10","10",false,false);
}
}
</script>
<form id="form_ricerca" name="form_ricerca" method="post" action="">
<table width="24%" border="1" cellpadding="1" cellspacing="1">
<tr>
<td width="13%"><input name="vendita" type="checkbox" id="vendita" onclick="venditanoleggio()" />
<label for="vendita"></label></td>
<td width="87%">Vendita</td>
</tr>
<tr>
<td><input type="checkbox" name="noleggio" id="noleggio" onclick="venditanoleggio()"/>
<label for="noleggio"></label></td>
<td>Noleggio</td>
</tr>
<tr>
<td><label for="prezzo"></label>
<select name="prezzo" id="prezzo">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
</select></td>
<td>Prezzo</td>
</tr>
</table>
</form>
</body>
</html>