mi sono spiegato male

ho il seguente codice

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>
<head>
<title>Untitled</title>
<STYLE TYPE="text/css">
.sfondo {background: #FFFF80}
.cambio {background : Blue;}

</STYLE>
<STYLE TYPE="text/css" MEDIA=print>
.x {width : 80%;}
</style>


<SCRIPT LANGUAGE="JavaScript">
var now = new Date();

function isEmpty(str) {
for (var intLoop = 0; intLoop<str.length; intLoop++)
if (" " != str.charAt(intLoop))
return false;
return true;
}

function checkSfondo(f) {
for (var intLoop = 0; intLoop<f.elements.length; intLoop++)
if ("Sfondo"==f.elements[intLoop].className) {
alert("All red fields are required.");
return false;
}
}

function fixUp(el) {
el.className = isEmpty(el.value) ? "sfondo" : "";
}

function checkChar(el) {
if (32 != event.keyCode)
el.className = "";
}
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function placeFocus() {
if (document.forms.length > 0) {
var field = document.forms[0];
for (i = 0; i < field.length; i++) {
if ((field.elements[i].type == "text") || (field.elements[i].type == "textarea") || (field.elements[i].type.toString().charAt(0) == "s")) {
document.forms[0].elements[i].focus();
break;
}
}
}
}
// End -->
</script>
</head>

<body OnLoad="placeFocus()" bgcolor="#FFFFFF">
<center>
<h1>ACCETTAZIONE</h1>
<form name="form1" action="">
<table class="x" cols=5 border="1" width=90%>
<tr align="center">
<td><label for="Data" ACCESSKEY=D>DATA</label></td>
<td><label for="Ricevente" ACCESSKEY=R>Ricevente</label></td>
<td><label for="Motivo" ACCESSKEY=M>Motivo</label></td>
<td><label for="Tecnico" ACCESSKEY=T>Tecnico</label></td>
<td><label for="Visita" ACCESSKEY=V>Visita</label></td>


</tr>
<tr align="center">
<td id="effect">
<input name="Data-contatto" ID="Data" type="text" tabindex=1 CLASS="sfondo" size=10 value="" onFocus="value = ( now.getDate() + ' / ' + now.getMonth()+' / '+ now.getYear()); " ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" onFocus="className='cambio'">
</td>


</td>
<td><select name="Ricevente" ID="Ricevente" tabindex=2 CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);"ONFOCUS="className='cambio' ">
<option>
<option STYLE="background:yellow; color:black" >Ricevente A
<option STYLE="background:green; color:white">Ricevente B
<option STYLE="background:red; color:white">Ricevente C
</select></td>
<td><select name="Motivo" ID="Motivo" tabindex=3 CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'">
<option>
<option STYLE="background:yellow; color:black" >Preventivo
<option STYLE="background:green; color:white">Riparazione
<option STYLE="background:red; color:white">Sollecito
</select>

<td><select name="Tecnico" ID="Tecnico" tabindex=4 CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'">
<option>
<option STYLE="background:yellow; color:black" >Tecnico A
<option STYLE="background:green; color:white">Tecnico B
<option STYLE="background:red; color:white">Tecnico C
</select></td>
<td><input name="visita" ID="visita" tabindex=5 CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" type="text" size="10" value=""></td>

</tr>
<tr align="center">
<td><label for="Appuntamento" ACCESSKEY=A>Appuntamento </label></td>
<td><label for="Zona" ACCESSKEY=Z>Zona</label></td>
<td><label for="Tavola" ACCESSKEY=L>Tavola</label></td>
<td><label for="Montatore" ACCESSKEY=O>Montatore</label></td>

</tr>
<tr align="center">
<td><input name="day" ID="Appuntamento" tabindex=7 type="text" size=2 value="" onFocus="value = (now.getDate() );"CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONBLUR="fixUp(this);" ONFOCUS="className='cambio'">
<select name="month" tabindex=8 type="text" size=1 onFocus="value=( now.getMonth());" CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONBLUR="fixUp(this);" ONFOCUS="className='cambio'">
<option value=1>Gennaio
<option value=2>Febbraio
<option value=3>Marzo
<option value=4>Aprile
<option value=5>Maggio
<option value=6>Giugno
<option value=7>Luglio
<option value=8>Agosto
<option value=9>Settembre
<option value=10>Ottore
<option value=11>Novembre
<option value=12>Dicembre
<input name="year" tabindex=9 type="text"size=4 value="" onFocus="value = (now.getYear());"CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONBLUR="fixUp(this);" ONFOCUS="className='cambio'">
</td>
<td><select tabindex=10 name="Zona" ID="Zona" CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'">
<option>
<option STYLE="background:yellow; color:black">Appio
<option STYLE="background:green; color:white">Montemario
<option STYLE="background:red; color:white">Portuense
<OPTION STYLE="background:blue; color:white" >Altre zone
<OPTION STYLE="background:fuchsia; color:white">...
</select>
</td>
<td><select name="Tavola" ID="Tavola" tabindex=11 CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'">
<option>
<option STYLE="background:yellow; color:black">1
<option STYLE="background:green; color:white">2
<option STYLE="background:red; color:white">3
<OPTION STYLE="background:blue; color:white" >4
<OPTION STYLE="background:fuchsia; color:white">...
</select></td>
<td><select name="Montatore" ID="Montatore" tabindex=6 CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'">
<option>
<option STYLE="background:yellow; color:black">Montatore A
<option STYLE="background:green; color:white">Montatore B
<option STYLE="background:red; color:white">Montatore C
</select></td>
</tr>
</table>
<HR width=90%>
<table class="x" cols=3 border=1 cellpadding=5 cellspacing=0 width=90%>
<tr >
<td ><label for="Cognome" ACCESSKEY=C>Cognome : </label><input name="Cognome" tabindex=12 CLASS="sfondo" ID="Cognome" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);"ONFOCUS="className='cambio' " type="text" value="" size="30"></td>
<td ><label for="Nome" ACCESSKEY=N>Nome : </label><input name="Nome" tabindex=13 ID="Nome" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="20"></td>
<td rowspan=6 ><label for="Note" ACCESSKEY=E>Note :</label>
<textarea name="Note" tabindex=14 ID="Note" CLASS="sfondo" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" rows=15 cols=50 ></textarea></td>
</tr>

<tr >
<td NOWRAP><label for="Via" ACCESSKEY=I>Via : </label><input name="Via" tabindex=15 ID="Via" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="30"></td>
<td><label for="Num" ACCESSKEY=U>Num : </label><input name="Num" tabindex=16 ID="Num" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="4"></td>
</tr>
<tr align="right">
<td colspan=2><label for="Comune" ACCESSKEY=P>Comune : </label><input name="Comune" tabindex=17 ID="Comune" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="45"></td>
</tr>

<tr align="right">
<td colspan=2><label for="Telefono" ACCESSKEY=F>Telefono : </label> <input name="Telefono" tabindex=18 ID="Telefono" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="25"></td></tr>
<tr align="right">
<td colspan=2><label for="Cellulare" ACCESSKEY=H>Cellulare : </label><input name="Cellulare" tabindex=19 ID="Cellulare" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="25"></td></tr>
<tr align="right">
<td colspan=2><label for="Fax" ACCESSKEY=X>Fax : </label><input name="Fax" tabindex=20 ID="Fax" CLASS="sfondo" type="text" ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" value="" size="25"></td>
</tr>
</table>
<center>
<table class="x" width ="90%">
<tr align="center">
<td><label for="Fax" ACCESSKEY=K><input type="submit" value="CONFERMA" tabindex=21></td>
<td><input type="reset" Value="ANNULLA" tabindex=22></td>
</form>

</tr>
</table>
</center>
</body>
</html>

lo script ok lo metto in un file esterno
ma vorrei mettere esternamente anche

<textarea name="Note" tabindex=14 ID="Note" CLASS="sfondo"

ONKEYPRESS="checkChar(this);" ONCHANGE="fixUp(this);" ONFOCUS="className='cambio'" rows=15 cols=50 ></textarea>


la parte in grassetto