scusate, volevo chiedere se c'era un modo di integrare un codice javascript in una pagina html già creata.

questo è il primo

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><title>Timed Textarea</title>

<script type="text/javascript">

function disable(){
document.forms["main"].elements["area"].disabled = true ;
document.forms["main"].elements["subm"].disabled = false;
}

function timeout(){
setTimeout('disable();', 10000);
};
</script>

</head>
<body bgcolor="#444242" text="#FFFFFF">

<table height="100%" border="0" cellpadding="0" cellspacing="0" width="100%"><tr>
<td align="center" valign="middle">

<form name="main" action="" method="">
<table border="0" cellpadding="0" cellspacing="0"><tr>
<td align="center" valign="middle">


<textarea name="area" rows="16" cols="48" onClick='timeout();'></textarea></p>
</td>
</tr><tr>
<td align="right" valign="middle">



<input name="subm" value="submit" type="submit" disabled="disabled"></p>
</td></tr>
</table>
</form>

</td></tr>
</table>


</body>
</html>
questo è il secondo:
<SCRIPT LANGUAGE="javascript">
function conta(){
var strlength=document.modulo.testo.value.length
total = eval("0")
char = eval(document.modulo.testo.value.length)
left = eval(total - char)
if (left <= "1")
{
var dif = eval(char - 250)
var value = document.modulo.testo.value.substr(0,char-dif);
document.modulo.testo.value = value;

}
document.modulo.quanti.value=left
}
</script>
<form name=modulo>
<TEXTAREA NAME=testo
onKeyUp='conta()'
onBlur='conta()'
onFocus='conta()'
rows="5"
cols="34">
</TEXTAREA>


<input type=text
name=quanti>
</SCRIPT>
</form>