Går ej i firefox?

Testar att lägga in smilies i en gästbok men detta fungerar bara i explorer och inte i firefox.. Gubbarna hoppar så fint ner i texten i explorer men i firefox sker inget. Vad kan vara galet?

Koden:

<td style="border-left-style: solid; border-left-width: 1px; border-top-style: solid; border-top-width: 1px; border-bottom-style: solid; border-bottom-width: 1px; padding-left: 4px; padding-right: 4px; padding-top: 1px; padding-bottom: 1px" bordercolor="#1E2535">

<form name="write" method="post" action="default.asp?action=addpost">

<%= yourname %>: 
<br />
<input name="namn" type="text" class="inmatning">
 <br />

<%= homepage %>:
<br />
<input name="url" type="text" class="inmatning" value="http://"> 
<br />

<%= email %>:
<br />
<input type="text" name="email" class="inmatning">  
<br />
<br /><br />

<td style="border-right-style: solid; border-right-width: 1px; border-top-style: solid; border-top-width: 1px; border-bottom-style: solid; border-bottom-width: 1px; padding-left: 4px; padding-right: 4px; padding-top: 1px; padding-bottom: 1px" bordercolor="#1E2535"><a href="Javascript:insertsmily('[:)]');"><img alt="smily  [:)]" border="0" hspace="0" src="images/glad.gif"></a>
<a href="Javascript:insertsmily('[:(]');"><img alt="smily  [:O]" border="0" hspace="0" src="images/sad.gif"></a>
<a href="Javascript:insertsmily('[:]]');"><img alt="smily  [:(]" border="0" hspace="0" src="images/naughty.gif"></a>
<a href="Javascript:insertsmily('[:V]');"><img alt="smily  [:V]" border="0" hspace="0" src="images/orolig.gif"></a>
<a href="Javascript:insertsmily('[8)]');"><img alt="smily  [;)]" border="0" hspace="0" src="images/rolleyes.gif"></a>
<a href="Javascript:insertsmily('[B):]');"><img alt="smily  [:V:]" border="0" hspace="0" src="images/cool.gif"></a> 
<a href="Javascript:insertsmily('[:P]');"><img alt="smily  [:D]" border="0" hspace="0" src="images/brag.gif"></a>

<br /> <br />

<font size="1"><b><%= Message %>: </b></font><br>
<textarea name="meddelande" cols="50" rows="5" class="inmatning"></textarea>
<br />
<input name="Submit" type="submit" class="input" value="<%= Post %>">

Javascriptet:

<script language="Javascript">
<!-- hide
function insertsmily(smilyface){
document.write.meddelande.value+=smilyface;
}
// -->
</script>

om du skall lägga in det i en textruta, byt ut då write till forms[0] eller forms[1] osv beroende på vilket formulär det är i ordningen på sidan.

<script language="Javascript">
<!-- hide
function insertsmily(smilyface){
document.[b]forms[0][/b].meddelande.value+=smilyface;
}
// -->
</script>

Funkade ju.. Tackar