asked on

Restrict multiple category selection

I have a multiple select option in a form, so the user can choose more than 1 category by holding down control and selecting. This means they can select any number of categories.

Is there any way to restrict this so they can only select say 1 option? Is this possible?

ASKER CERTIFIED SOLUTION

David H.H.Lee

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Michel Plungjan

If you want to SHOW the options but still only have one selection, just change the size

<select size="4">
<option value="">Please select</option>
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
</select>

dartagnon

ASKER

Thanks x com, that worked brilliantly. Here is what I ended up with:
<select name="categoryID" size="6" multiple="true" onclick="changeOpt(this);">
<option value="0" selected="selected">-- Select Category --</option>
<%
While (NOT categories.EOF)
%>
<option value="<%=(categories.Fields.Item("categoryID").Value)%>" ><%=(categories.Fields.Item("categoryname").Value)%></option>
<%
categories.MoveNext()
Wend
If (categories.CursorType > 0) Then
categories.MoveFirst
Else
categories.Requery
End If
%>
</select>
<script>
function changeOpt(sel){
var opts='';
var intSel=0;

for(i=0;i<sel.length;i++){
if(sel.options[i].selected){
intSel+=1;

if(intSel>3){
sel.options[i].selected=false;
}
}
}
}

</script>