dynamic multiple selects

[d.schulz81@gmx.net]

Holas,

I want to do the following:
If one entry in multiple select "domain" is selected, i want to change
the content in dropdown "typ" dynamically according to the selected
domain.

If more than one entries in domain are selected, i want the dropdown
typ to disappear

here the javaScriptCode that causes an "typ has no properties" -Error:


<script language="Javas cript">
<!-- Start
function updateType()
{
domain = document.forms["frm"].elements["txtDomain"];
typ = document.forms["frm"].elements["txtType"];

typ.options.len gth = 0; // DropDown Menü entleeren

if (domain.options
[domain.selected Index].
value == "Email")
{
typ.options[0] = new Option("Softwar e");
typ.options[1] = new Option("Anbiete r");
}
else if (domain.options
[domain.selected Index].
value == "Internet")
{
typ.options[0] = new Option("Interne tzugang");
typ.options[1] = new Option("Webseit en erstellen");
}
}
// Ende -->
</script>



here the multi selects:

<tr class="color1">
<td>Domain: (Mehrfachauswah l mit <br/>gedrückter Strg-Taste
möglich)</TD>
<td colspan="2">
<SELECT size=3 name="txtDomain[]" multiple="multi ple"
onchange="updat eType()">
<OPTION value=0 selected> alle </OPTION>
<?
while ($arrDomain = mysql_fetch_arr ay($rsDomain))
{
echo("<OPTION value=".$arrDom ain["ID"]."> ".$arrDomai n["Name"]."
</OPTION>");
}
?>
</SELECT>
</TD>
</TR>



<tr class="color1">
<td>Type: (Mehrfachauswah l mit <br/>gedrückter Strg-Taste
möglich)</TD>
<td colspan="2">
<SELECT size=3 name="txtType[]" multiple="multi ple">
<OPTION value=0 selected> alle </OPTION>
</SELECT>
</TD>
</TR>

I would appreciate any help..
thank you very much

Dennis

[Mick White]

Re: dynamic multiple selects

d.schulz81@gmx. net wrote:[color=blue]
> Holas,
>
> I want to do the following:
> If one entry in multiple select "domain" is selected, i want to change
> the content in dropdown "typ" dynamically according to the selected
> domain.
>
> If more than one entries in domain are selected, i want the dropdown
> typ to disappear
>
> here the javaScriptCode that causes an "typ has no properties" -Error:
>
>
> <script language="Javas cript">
> <!-- Start
> function updateType()
> {
> domain = document.forms["frm"].elements["txtDomain"];[/color]

domain = document.forms["frm"].elements["txtDomain[]"];

[color=blue]
> typ = document.forms["frm"].elements["txtType"];[/color]

typ = document.forms["frm"].elements["txtType[]"];

No?

Mick[color=blue]
>[/color]
[snip]