<table border="2" frame="box" rules="none" bgcolor="#F0E68C" style="border-color: #6196ed">
<form name="elimina">
<tr>
<th colspan="2">
Elimina un elemento
</th>
</tr>
<tr>
<td>
<table border="1" frame="box" rules="none" bgcolor="#FFCC33">
<tr>
<th>
Codice
</th>
</tr>
<tr>
<th>
<input type="text" name="codice" style="text-align:center;" onkeypress="if(event.keyCode==13) return controlla()" />
</th>
</tr>
</table>
</td>

<td>
<input type="button" value="Elimina" style="height:50px;" onclick="JavaScript:return controlla();" />
</td>
</tr>
</form>
</table>


function controlla(){
if(document.elimina.codice.value.length < 1)
{
alert("Inserisci il codice di eliminazione!");
return false;
}else{
refresh();
return true;
}
}